ax-c=bx d
how do i solve for x?
do this:
ax-bx=d c (get Xs on one side)
x(a-b)=d c (factor out x)
x = (d c) / (a-b) (divide by (a-b))
ax-c=bx d
solution
ax-bx=c d
x(a-b)=c d
x=(c d)/(a-b)
Tuesday, July 20, 2010
What evidence contradicted the idea that heat was a fluid?
from count rumford
The fundamental observation is that a hot object does not lose mass as it cools. If heat were a fluid, cooling would cause a loss of mass and heating would cause an increase of mass.
From what I remember from high-school, it was a realization that it contradicted the laws of conservation (you could
The fundamental observation is that a hot object does not lose mass as it cools. If heat were a fluid, cooling would cause a loss of mass and heating would cause an increase of mass.
From what I remember from high-school, it was a realization that it contradicted the laws of conservation (you could
I need to make a air tank on the cheap ? pvc?
i need to make a 300 gallon tank for like 30$ :D
also are there really wide pvc pipes so that i could achieve this?
like 4 feet wide and 6 feet tall?
it depends on how much pressure you need in this tank.
if the pressure is low then maybe you could get a couple of plastic barrels and join them. For the price you mention, I doubt you will be able to get a pipe this size.
For $30?
I don
also are there really wide pvc pipes so that i could achieve this?
like 4 feet wide and 6 feet tall?
it depends on how much pressure you need in this tank.
if the pressure is low then maybe you could get a couple of plastic barrels and join them. For the price you mention, I doubt you will be able to get a pipe this size.
For $30?
I don
I need some help with car insurance please.?
About a year ago my husband and I sold a car. We went through the usual channels with dealing with the plates, calling the insurance company and so on. Well today we got our yearly insurance cards in the mail and didn
Calculate the mass of 2.50 mol of CH3OH(1)?
Just multiply the number of moles by its molar weight
molar weight of CH3OH:
C = 1 x 12.0 = 12.0
O= 1 x 16.0 = 16.0
H= 4 x 1.01 = 4.04
Total = 32.04 g/mole
(2.50 moles)(32.04 g/mole) = 80.1 g
molar weight of CH3OH:
C = 1 x 12.0 = 12.0
O= 1 x 16.0 = 16.0
H= 4 x 1.01 = 4.04
Total = 32.04 g/mole
(2.50 moles)(32.04 g/mole) = 80.1 g
What is the difference between bacteria ad germs?
germs is the common term used to identify the microorganisms which cause diseases to humans
it is not a scientific term
bacteria are one of the groups of microorganisms (others are, viruses, fungi , algae)
they may be useful to us and cause harm to us at the same time
all germs are bad to the body but not all bacteria
Germs don
it is not a scientific term
bacteria are one of the groups of microorganisms (others are, viruses, fungi , algae)
they may be useful to us and cause harm to us at the same time
all germs are bad to the body but not all bacteria
Germs don
In the graph, vertex S of figure RSTW has the coordinates (15,9). If RSTW is reflected across the X-axis what?
Good Morning,
I am baffled by this question and hopes someone could explain to me how the book got the answer.
Here is the link to the graph in question:
http://i42.photobucket.com/albums/e319/tomh68/HOMEWORK/RSTW.jpg
The question is:
In the graph above, vertex S of figure RSTW has the coordinates (15,9). If RSTW is reflected across the X-axis, what are the coordinates of the image of vertex W?
The book answer says it
I am baffled by this question and hopes someone could explain to me how the book got the answer.
Here is the link to the graph in question:
http://i42.photobucket.com/albums/e319/tomh68/HOMEWORK/RSTW.jpg
The question is:
In the graph above, vertex S of figure RSTW has the coordinates (15,9). If RSTW is reflected across the X-axis, what are the coordinates of the image of vertex W?
The book answer says it
In abiogenesis, when did DNA evolve?
I think you need to distinguish between evolution and the origins of DNA. Evolution is usually a term that is reserved for changes in living organisms, and you are asking a question that goes back to the time before organisms.
In most conceptions of the origins of what are now considered biomolecules proteins and RNA precede DNA. There are different ideas of how the stuff of life started, though it
In most conceptions of the origins of what are now considered biomolecules proteins and RNA precede DNA. There are different ideas of how the stuff of life started, though it
Momentum question please help!?
A 15 kg penguin waddling east at a velocity of 7 m/s collides with a stationary 10 kg penguin. After the collision the 15 kg penguin is traveling at a velocity of 4.2 m/s 20 degrees S of E.
a) what is the velocity of the 10 kg penguin after collision?
b) is this collision elastic or inelastic?
i have no idea how to do this question, step by step explanation please, much appreciated!
(a)Let the velocity of 10 kg penguin is v m/s after the collision,
=
a) what is the velocity of the 10 kg penguin after collision?
b) is this collision elastic or inelastic?
i have no idea how to do this question, step by step explanation please, much appreciated!
(a)Let the velocity of 10 kg penguin is v m/s after the collision,
=
I have an area of 28.15 square meters?
I have an area of 28.15 square meters
If 1 liter of paint covers an area of 9 square meters ,
how many liters of paint are needed for two coats?
6.256 liters
Divide 28.15 by 9 and whatever the answer is, multiply by 2
Wow, the lack of brain power of some people amazes me...
If 1 liter of paint covers an area of 9 square meters ,
how many liters of paint are needed for two coats?
6.256 liters
Divide 28.15 by 9 and whatever the answer is, multiply by 2
Wow, the lack of brain power of some people amazes me...
Linear demand function question?
For the linear equation given by y=-0.25x 4
1..Find the resulting change in the value of y if x decreases by 2 units.
2.Transpose the equation to express x in terms of y and write down the value of
the x-intercept.
b. The general form of a linear demand function is given by
Q_d=a bp (a
1..Find the resulting change in the value of y if x decreases by 2 units.
2.Transpose the equation to express x in terms of y and write down the value of
the x-intercept.
b. The general form of a linear demand function is given by
Q_d=a bp (a
How big will a circle be if 4320 ft of rope is used?
We can apply the formula for calculating the circumference of circles, which is diameter = circumference. In this case, we have the circumference (4320 feet). To calculate the diameter, we can re-arrange the equation a little, and the answer is (4320 Ft ), which is 1375.0988 feet (correct to 4 decimal places).
In a ph meter why must the filling hole be left open? i
Equalization of pressure. The glass bulb has a very slight porosity. It is also one of the reasons it is stored in a solution.
Health insurance in Massachusetts seems to be very expensive...which is the cheapest insurance?
I am planning to get pregnant..Actually i have health insurance covered by my husband
Questions about opening a zoo?
when im older like 25 what does it take to open a zoo i have a big interest in animals and if you own a zoo can you make contact with some of the animals? do feeders make contact with the animals?
It takes a lot of work to open a zoo. First you should get some degrees in zoology, marine biology if you plan to have marine animals, and business would be some good things to start with. You also need to buy a large plot of land. Then you
It takes a lot of work to open a zoo. First you should get some degrees in zoology, marine biology if you plan to have marine animals, and business would be some good things to start with. You also need to buy a large plot of land. Then you
Why is it that the differentiation of y=ln(1 e^2x) is dy/dx=2e^(2x)/(1 e^2x)?
I must have missed a property or theorem along the way, because I cannot figure out why the differentiation of y=ln(1 e^2x) is dy/dx=2e^(2x)/(1 e^2x)? Any help would be greatly appreciated. Thanks! :)
The derivate of lnu is u
The derivate of lnu is u
How are pearls formed?
There are essentially three types of pearls: natural, cultured and imitation. A natural pearl (often called an Oriental pearl) forms when an irritant, such as a piece of sand, works its way into a particular species of oyster, mussel, or clam. As a defense mechanism, the mollusk secretes a fluid to coat the irritant. Layer upon layer of this coating is deposited on the irritant until a lustrous pearl is formed.
A cultured pearl undergoes the same process. The only difference is that the irritant is a surgically implanted bead or piece of shell called Mother of Pearl. Often, these shells are ground oyster shells that are worth significant amounts of money in their own right as irritant-catalysts for quality pearls. The resulting core is, therefore, much larger than in a natural pearl. Yet, as long as there are enough layers of nacre (the secreted fluid covering the irritant) to result in a beautiful, gem-quality pearl, the size of the nucleus is of no consequence to beauty or durability.
Pearls can come from either salt or freshwater sources. Typically, saltwater pearls tend to be higher quality, although there are several types of freshwater pearls that are considered high in quality as well. Freshwater pearls tend to be very irregular in shape, with a puffed rice appearance the most prevalent. Nevertheless, it is each individual pearls merits that determines value more than the source of the pearl.
Regardless of the method used to acquire a pearl, the process usually takes several years. Mussels must reach a mature age, which can take up to 3 years, and then be implanted or naturally receive an irritant. Once the irritant is in place, it can take up to another 3 years for the pearl to reach its full size. Often, the irritant may be rejected, the pearl will be terrifically misshapen, or the oyster may simply die from disease or countless other complications. By the end of a 5 to 10 year cycle, only 50% of the oysters will have survived.(3) And of the pearls produced, only approximately 5% are of substantial quality for top jewelry makers.(4) From the outset, a pearl farmer can figure on spending over $100 for every oyster that is farmed, of which many will produce nothing or die.
The inside of Oytser shells are coated with calcium carbonate. When a particle gets inside the shell and irritates this layer the oyster coats the irritant with this calcium carbonate layer. The layering of minerals produces a pearl.
There are multiple types of pearls...
The difference between natural and cultured pearls focuses on whether the pearl was created spontaneously by nature, without human intervention, or with human aid. Pearls are formed inside the shell of certain mollusks: as a defense mechanism to a potentially threatening irritant such as a parasite inside its shell, injuring the mantle tissue. The mollusk creates a pearl sac to seal off the irritation.The mantle of the mollusk deposits layers of calcium carbonate in the form of the mineral aragonite or a mixture of aragonite and calcite and together by an organic horn-like compound called conchiolin. The combination of aragonite and conchiolin is called nacre, which makes up mother-of-pearl. The commonly held belief that a grain of sand acts as the irritant is in fact rarely the case. Typical stimuli include organic material, parasites, or even damage that displaces mantle tissue to another part of the animal
A cultured pearl undergoes the same process. The only difference is that the irritant is a surgically implanted bead or piece of shell called Mother of Pearl. Often, these shells are ground oyster shells that are worth significant amounts of money in their own right as irritant-catalysts for quality pearls. The resulting core is, therefore, much larger than in a natural pearl. Yet, as long as there are enough layers of nacre (the secreted fluid covering the irritant) to result in a beautiful, gem-quality pearl, the size of the nucleus is of no consequence to beauty or durability.
Pearls can come from either salt or freshwater sources. Typically, saltwater pearls tend to be higher quality, although there are several types of freshwater pearls that are considered high in quality as well. Freshwater pearls tend to be very irregular in shape, with a puffed rice appearance the most prevalent. Nevertheless, it is each individual pearls merits that determines value more than the source of the pearl.
Regardless of the method used to acquire a pearl, the process usually takes several years. Mussels must reach a mature age, which can take up to 3 years, and then be implanted or naturally receive an irritant. Once the irritant is in place, it can take up to another 3 years for the pearl to reach its full size. Often, the irritant may be rejected, the pearl will be terrifically misshapen, or the oyster may simply die from disease or countless other complications. By the end of a 5 to 10 year cycle, only 50% of the oysters will have survived.(3) And of the pearls produced, only approximately 5% are of substantial quality for top jewelry makers.(4) From the outset, a pearl farmer can figure on spending over $100 for every oyster that is farmed, of which many will produce nothing or die.
The inside of Oytser shells are coated with calcium carbonate. When a particle gets inside the shell and irritates this layer the oyster coats the irritant with this calcium carbonate layer. The layering of minerals produces a pearl.
There are multiple types of pearls...
The difference between natural and cultured pearls focuses on whether the pearl was created spontaneously by nature, without human intervention, or with human aid. Pearls are formed inside the shell of certain mollusks: as a defense mechanism to a potentially threatening irritant such as a parasite inside its shell, injuring the mantle tissue. The mollusk creates a pearl sac to seal off the irritation.The mantle of the mollusk deposits layers of calcium carbonate in the form of the mineral aragonite or a mixture of aragonite and calcite and together by an organic horn-like compound called conchiolin. The combination of aragonite and conchiolin is called nacre, which makes up mother-of-pearl. The commonly held belief that a grain of sand acts as the irritant is in fact rarely the case. Typical stimuli include organic material, parasites, or even damage that displaces mantle tissue to another part of the animal
Does thought instigate evolution?
Maybe not a physical evolution but an evolutionary process nonetheless. I don
Is there any insurance company
I know the rules about insuring a car fully comp enabling you to drive someone elses car (third party) with there permission... if you are over 25 or with company
What is the weather like in London?
it said there was supposed to be a heatwave today but it is raining in Exmouth
i dunno about london, but it
i dunno about london, but it
How do you learn telekinesis easily?
please tell me how!
Hmm, interesting concept. Please, I have a question. If no-one anywhere in the history of the world has ever performed this how, pray tell, do expect to learn it from anyone? It is not like tying your shoelace. That can be done and taught. Sorry, you cannot teach the unteachable.
It is like trying to teach someone to fly eight reindeer pulling a big sleigh full of toys all around the world going to every child
Hmm, interesting concept. Please, I have a question. If no-one anywhere in the history of the world has ever performed this how, pray tell, do expect to learn it from anyone? It is not like tying your shoelace. That can be done and taught. Sorry, you cannot teach the unteachable.
It is like trying to teach someone to fly eight reindeer pulling a big sleigh full of toys all around the world going to every child
How does electrical force differ from gravitational force?
The electrical (actually electromagnetic) force is much much much stronger than the gravitational force (10 followed by 38 zeroes times stronger).
The source of the electrical force is charged (positive and negative) matter only (not neutral matter like neutrons), whereas all matter and energy is a source of gravitational force.
The gravitational force is only attractive, whereas the electrical force can be attractive (unlike charges) or repulsive (like charges i.e. negative-negative or positive-positive)
The biggest difference I can think of is gravitational force attracts (draws objects nearer to the source) but electrical force can attract or repel, depending on the circumstances.
Well electrical force affects only charged molecules whereas gravitational force affects everything.
Only different as far as I know.. biology student :D
The source of the electrical force is charged (positive and negative) matter only (not neutral matter like neutrons), whereas all matter and energy is a source of gravitational force.
The gravitational force is only attractive, whereas the electrical force can be attractive (unlike charges) or repulsive (like charges i.e. negative-negative or positive-positive)
The biggest difference I can think of is gravitational force attracts (draws objects nearer to the source) but electrical force can attract or repel, depending on the circumstances.
Well electrical force affects only charged molecules whereas gravitational force affects everything.
Only different as far as I know.. biology student :D
Using integration, how do you determine the volume of a frustum of a right circular cone?
We have to use the concept of v=(integral from b to a) A(x)dx to determine the volume of a frustum of a right circular cone with height h, lower base radius R and top radius r. I did it a few times, and got slightly different answers, so I know I
Physics: You reach out a second story window 5m above sidewalk, throw a 0.1kg ball up with 6J of kinetic ener?
What is the balls gravitational energy when it is released?
What is the balls gravitational energy just before hitting the sidewalk?
What is the balls kinetic energy just before hitting the sidewalk?
How would the answer to (C) change if the ball has initially been thrown straight down with 6J of kinetic energy?
I cant figure out what formulas to use??? Help
KE = ()mV...kinetic energy
PE = mgh...gravitational potential energy
at [t = 0]PE = mgh
PE = (0.1)(9.8)(5)
PE = 4.9 Joules
______________________________________
at [t = impact]PE = (0.1)(9.8)(0) = 0 Joules
______________________________________
at [t = impact]all of the ball
What is the balls gravitational energy just before hitting the sidewalk?
What is the balls kinetic energy just before hitting the sidewalk?
How would the answer to (C) change if the ball has initially been thrown straight down with 6J of kinetic energy?
I cant figure out what formulas to use??? Help
KE = ()mV...kinetic energy
PE = mgh...gravitational potential energy
at [t = 0]PE = mgh
PE = (0.1)(9.8)(5)
PE = 4.9 Joules
______________________________________
at [t = impact]PE = (0.1)(9.8)(0) = 0 Joules
______________________________________
at [t = impact]all of the ball
Write the complex number in rectangular form round to the nearest tenth?
4(cos 5/6 i sine 5/6)
You want to have an answer in the form a bi, where a and b are real numbers.
a = rcos and b = rsin
Here, r = 4 and = 5/6
.. a = 4cos(5/6) = 4(-(3)/2) = -2(3)
b = 4sin(5/6) = 4(1/2) = 2
.. 4(cos 5/6 i sine 5/6) = -2(3) 2i
Note: Instead of writing 4(cos 5/6 i sine 5/6), you can use the abbreviated version rcis, where the
You want to have an answer in the form a bi, where a and b are real numbers.
a = rcos and b = rsin
Here, r = 4 and = 5/6
.. a = 4cos(5/6) = 4(-(3)/2) = -2(3)
b = 4sin(5/6) = 4(1/2) = 2
.. 4(cos 5/6 i sine 5/6) = -2(3) 2i
Note: Instead of writing 4(cos 5/6 i sine 5/6), you can use the abbreviated version rcis, where the
Explanation for the black background in Space?
I would like a scientific explanation to why any picture of Earth and/or Moon portrays a completely pitch black view of the cosmos.
Thanks.
On the pictures you saw, the Earth or the Moon are brightly lit by the Sun. This means that the camera has to adjust to the bright light, so it used a short exposure time. Stars are very faint, and the camera would have to use a long exposure to get them to show.
http://en.wikipedia.org/wiki/Exposure_%2
There are some pictures of the night side of the Earth, and some stars are visible.
http://sphotos.ak.fbcdn.net/hphotos-ak-s
It
Thanks.
On the pictures you saw, the Earth or the Moon are brightly lit by the Sun. This means that the camera has to adjust to the bright light, so it used a short exposure time. Stars are very faint, and the camera would have to use a long exposure to get them to show.
http://en.wikipedia.org/wiki/Exposure_%2
There are some pictures of the night side of the Earth, and some stars are visible.
http://sphotos.ak.fbcdn.net/hphotos-ak-s
It
What is the Antiderivative of x^-2 and 2x^-2 ?
What is the Antiderivative of x^-2 and 2x^-2?
If you know how to do derivatives then antiderivatives are a piece of cake, it
If you know how to do derivatives then antiderivatives are a piece of cake, it
Can I dig a well to get lava to heat my room?
Lava? Depends on where you are and how thick the crust is beneath you.
But if you just want to use a geothermal heat pump, you can go down 6 - 10 feet, and the ground temperature will stabilize between 45 - 70F. Doesn
But if you just want to use a geothermal heat pump, you can go down 6 - 10 feet, and the ground temperature will stabilize between 45 - 70F. Doesn
To what point can Nebulae photos be considered realistic?
It is of common knowledge that nebulae photos are of magnificent beauty.
Yet, considering the size and form of most of these cosmic clouds, how is it that they are portrayed in such high quality and definition?
Objects are realistic, colours can be realistic or representative (false-colour).
Realistic colours are obtained by taking black
Yet, considering the size and form of most of these cosmic clouds, how is it that they are portrayed in such high quality and definition?
Objects are realistic, colours can be realistic or representative (false-colour).
Realistic colours are obtained by taking black
Story problem about area using derivatives?
A dairy farmer plans to enclose a rectangular pasture adjacent to a river. To provide enough grass for the herd, the pasture must contain 180,000 square meters. No fencing is required along the river. What dimensions will use the smallest amount of fencing?
Area is given as:
A = L*W = 180000m
3-sided fencing length is:
F = L 2W
F = (A/W) 2W
Find minimum fencing by setting derivative =0
dF/dW = 2-A/W = 0
W = (A/2) = 300m
L = A/W = 600m
F = L 2W = 1200m
Area is given as:
A = L*W = 180000m
3-sided fencing length is:
F = L 2W
F = (A/W) 2W
Find minimum fencing by setting derivative =0
dF/dW = 2-A/W = 0
W = (A/2) = 300m
L = A/W = 600m
F = L 2W = 1200m
Random numbers from a set. probability?
5 numbers are selected at random from the set
{1,2,3,...,20}
What is the probability that their MINIMUM
(smallest of the 5 picked numbers)
is greater than 5?
Thanks in advanced.
If repetitions are not allowed:
(15 p 5) / (20 p 5) = 0.1937
*Edit*
There are 3 ways to approach the problem, all of which get the same answer. I chose to think of it in terms of fractions:
(15/20)(14/19)(13/18)(12/17)(11/16).
But I wrote it like (15p5)/(20p5) because that
{1,2,3,...,20}
What is the probability that their MINIMUM
(smallest of the 5 picked numbers)
is greater than 5?
Thanks in advanced.
If repetitions are not allowed:
(15 p 5) / (20 p 5) = 0.1937
*Edit*
There are 3 ways to approach the problem, all of which get the same answer. I chose to think of it in terms of fractions:
(15/20)(14/19)(13/18)(12/17)(11/16).
But I wrote it like (15p5)/(20p5) because that
Online Geometry notes anyone?
Hey guys im looking for some online geometry notes for 10th grade. I really don
Monday, July 12, 2010
How do you FOIL this?
(0.139 - 2.238x 9x^2) (0.373 - 3x)
I know that to foil you multiply First Outer Inner Last, but how do you calculate -2.238x ?
Thanx
Answer:
-27x^3 10.071x^2 - 1.25177x 0.051847
i
I know that to foil you multiply First Outer Inner Last, but how do you calculate -2.238x ?
Thanx
Answer:
-27x^3 10.071x^2 - 1.25177x 0.051847
i
How to foil when there is an exponent on one of the parenthesis?
For example, (0.862 - x) (0.373 - 3X)^3.
Thanks
I believe you would expand the second bracket because of the exponent:
(0.373 - 3X) x (0.373 - 3X) x (0.373 - 3X)
so you FOIL the first 2 sets of brackets. Take the newly found answer
(0.139 - 2.238 9x^2) (0.373 - 3x)
FOIL the above and then take that answer and FOIL it with (0.862 - x)
(*new answer*) (0.862 -x )
Make sure I did it right and find your own answer :)
You don
Thanks
I believe you would expand the second bracket because of the exponent:
(0.373 - 3X) x (0.373 - 3X) x (0.373 - 3X)
so you FOIL the first 2 sets of brackets. Take the newly found answer
(0.139 - 2.238 9x^2) (0.373 - 3x)
FOIL the above and then take that answer and FOIL it with (0.862 - x)
(*new answer*) (0.862 -x )
Make sure I did it right and find your own answer :)
You don
Calculating density...can someone please check my work?
A sample of unknown metal is placed in a graduated cylinder containing water. The mass of the sample is 37.5 g and the water levels before and after adding the sample to the cylinder are shown in mL as shown, (withouth sample 12.0
Does anyone know why the stars glow ?
I know but you tell me what you think.
Stars are suns. They are balls of fire and light, hydrogen, helium, iron, nickel, oxygen, silicon, sulfur, magnesium, carbon, neon, calcium, and chromium. But the fire, hydrogen, and oxygen is what makes it appear to be
Stars are suns. They are balls of fire and light, hydrogen, helium, iron, nickel, oxygen, silicon, sulfur, magnesium, carbon, neon, calcium, and chromium. But the fire, hydrogen, and oxygen is what makes it appear to be
I put my wall themometer outside just a few minutes ago at 3:30 in South Florida where I live and it?
registered 124 degrees. The reported temperature by the Weather Channel is only 95. How is this possible? They have to be lying. Even if you split the difference the temp is 110.
Is the thermometer in direct sunlight? They should be in a shaded area, so you are getting a true air temperature reading, that is unaffected by direct sunlight. The NWS uses a Stevenson
Is the thermometer in direct sunlight? They should be in a shaded area, so you are getting a true air temperature reading, that is unaffected by direct sunlight. The NWS uses a Stevenson
Is it getting warmer or am I getting used to the cold?
I remember in 1st grade I used to have to wear a really thick winter jacket just about every day from the end of October/beginning of November. Now I
A hnRNP is............?
a) a RNA-protein complex formed prior to export from the nucleus
b) a DNA-RNA hybrid duplex created during transcription
c) a RNA-protein complex which assists translation of other proteins
d) a RNA-protein complex that is transcribed but not translated
e) a RNA-protein complex translated by the ribosome
a) an RNA-protein complex formed prior to export from the nucleus.
In reality, mRNA is never found either in the nucleoplasm or the cytoplasm unless it is complexed with proteins. This RNA-protein complex is called hnRNP which is an abreviation for heterogeneous nuclear ribonucleoprotein. Any piece of RNA that is found in the nucleus or cytoplasm not attached to certain proteins are highly susceptible to degradation by exonucleases, enzymes specifically present to degrade RNA.
well scientists identified the gene smooth (sm) in a screen for genes that are specifically expressed within the lineage that forms the adult chemosensory bristles. sm is expressed in most or all differentiating neurones during embryogenesis, but is specifically expressed in the neurones of the adult chemosensory organs on the wings and legs during metamorphosis. The inactivation of sm results in axonal defects in the chemosensory neurones, in the inability of mutant flies to feed and in their precocious death. As sm belongs to a family of heterogeneous nuclear ribonucleoprotein (hnRNP), we propose that the control of axonal navigation and connectivity is partly achieved at the level of mRNA splicing or exporting.
The Scientists Conclusion
scientists analysed the pattern of expression of sm by in situ hybridization throughout development. sm is not expressed until late stages of embryogenesis, when transcripts are observed in most or all neurones of the CNS and in a subset of chordotonal neurones as well as, at a lower level, in other sensory neurones. No other tissue or structure is labelled during embryogenesis.
b) a DNA-RNA hybrid duplex created during transcription
c) a RNA-protein complex which assists translation of other proteins
d) a RNA-protein complex that is transcribed but not translated
e) a RNA-protein complex translated by the ribosome
a) an RNA-protein complex formed prior to export from the nucleus.
In reality, mRNA is never found either in the nucleoplasm or the cytoplasm unless it is complexed with proteins. This RNA-protein complex is called hnRNP which is an abreviation for heterogeneous nuclear ribonucleoprotein. Any piece of RNA that is found in the nucleus or cytoplasm not attached to certain proteins are highly susceptible to degradation by exonucleases, enzymes specifically present to degrade RNA.
well scientists identified the gene smooth (sm) in a screen for genes that are specifically expressed within the lineage that forms the adult chemosensory bristles. sm is expressed in most or all differentiating neurones during embryogenesis, but is specifically expressed in the neurones of the adult chemosensory organs on the wings and legs during metamorphosis. The inactivation of sm results in axonal defects in the chemosensory neurones, in the inability of mutant flies to feed and in their precocious death. As sm belongs to a family of heterogeneous nuclear ribonucleoprotein (hnRNP), we propose that the control of axonal navigation and connectivity is partly achieved at the level of mRNA splicing or exporting.
The Scientists Conclusion
scientists analysed the pattern of expression of sm by in situ hybridization throughout development. sm is not expressed until late stages of embryogenesis, when transcripts are observed in most or all neurones of the CNS and in a subset of chordotonal neurones as well as, at a lower level, in other sensory neurones. No other tissue or structure is labelled during embryogenesis.
What is the probability that next child will be type O if only the D gene for the Rh group?
In humans, the ABO and Rh are under the control of autosomal genes. If two parents who are both type A positive, produce a child who is type O negative, what is the probability that their child will be type O positive when considering only the D gene for the Rh group?
the chance is 3/4 or 75% because if they had a child who was O- that means they both have + and - for their D genes. so if you make a punnet square with two heterozygous for the D gene (one + and one -) you would come out with the posibilities of the child being ++,+-,+-, or - - which means that three out of four of their children will be positive for the D gene.%0D%0A
the chance is 3/4 or 75% because if they had a child who was O- that means they both have + and - for their D genes. so if you make a punnet square with two heterozygous for the D gene (one + and one -) you would come out with the posibilities of the child being ++,+-,+-, or - - which means that three out of four of their children will be positive for the D gene.%0D%0A
How do you know that beyond atoms and quarks... life doesn
Think about it. Planets seems to be some sort of cells or atoms. Maybe beyond the universe lies a living body in which we live in. Their life expectancy is a number that we don
What would happen to Earth if an object that
Assuming that there was an energy ball (most likely made out of nuclear fusion), which has the mass of a super massive black hole, yet still has the volume of a soccer ball. Now imagine that energy ball (I guess you can even call it a star) being placed on Earth
Can anyone help me with this math problem pleasse?
Lynne invested $8500 in an RRSP with a guaranteed interest rate of 4.75% per annum, compounded quarterly, for 5 years.
1.) Calculate the value of Lynne
1.) Calculate the value of Lynne
No graphing occurs on my TI-83?
After I put the numbers in L1 and L2 I press 2nd 1 and 2nd 2 (entering both times) to get both L1 and L2 on the screen. Then I go to the plots and turn the first one on and pick which graph I want. When I press graph nothing ever happens. I don
QUADRATIC EQUATIONS----WORD PROBLEMS?
if the perimeter of a rectangular plot is 68 m and length of its diagonal is 26 m fin it area
plz someone help.......
thnx
if perimeter is 68, then
2L 2W = 68
L W = 34
W = 34 - L
and since diagonal is 26,
L W = 26
L (34 - L) = 26
L 34 - 68L L = 26
2L - 68L 480 = 0
L - 34L 240 = 0
(L - 24)(L - 10) = 0
so L = 24, W = 10 area = 240 or L = 10, W = 24, area = 240
plz someone help.......
thnx
if perimeter is 68, then
2L 2W = 68
L W = 34
W = 34 - L
and since diagonal is 26,
L W = 26
L (34 - L) = 26
L 34 - 68L L = 26
2L - 68L 480 = 0
L - 34L 240 = 0
(L - 24)(L - 10) = 0
so L = 24, W = 10 area = 240 or L = 10, W = 24, area = 240
Any body hear about the impending solar flash?Is it a dangerous one?
Someone told there is a solar flash that is going to kill some people,does any body know if it is true?Or is it another scam like Gores global warming lie.??
Global warming is not a lie; climate change is real, but not at the pace the governments claim it is.
I think they misunderstood the solar flare news. There are impending solar flares, and they can disrupt the power grids on Earth. But they will not kill people; the radiation is not strong enough to penetrate the atmosphere enough to affect people in a serious manner.
Sounds like you
Global warming is not a lie; climate change is real, but not at the pace the governments claim it is.
I think they misunderstood the solar flare news. There are impending solar flares, and they can disrupt the power grids on Earth. But they will not kill people; the radiation is not strong enough to penetrate the atmosphere enough to affect people in a serious manner.
Sounds like you
How to determine the value of these functions?
pleaseee help............a.F ( 2 )......b. F ( -1 )......c. F ( 0 )
use the formula to solve it.
use the formula to solve it.
For an automobile, how would the kinetic energies compare at 50 km/h and at 100 km/h? How might this affect s?
if any one can do dis
physice sam
i ll be so happy for ur help
4. The effect of mass on kinetic energy was not investigated in this simulation. How might the kinetic energy of a car travelling at 50 km/h compare with a more massive truck travelling at the same speed?
and the formila to be use for thoes to sam
are Ek= 1/2mv2 if any one knoe that please do and help me out ..
Kinetic energy is directly related to the mass of the object. So , at the same speed, if the mass was double, the kinetic energy would be double.
Kinetic energy is also directly related to the square of the velocity. So , with the same mass, if the velocity was double, the kinetic energy would be 2^2 or 4 times more.
For your initial question, the auto would first have a Ek represented by 1/2mv^2 or 1/2 m (50)^2.
This would be a velocity factor represented by (2500)
The same auto travelling at 100km/h would have a Ek represented by 1/2m (100^2)
This would be a velocity factor represented by (10,000)
The second auto would have 10000/2500 = 4 times the kinetic energy of the first.
In order to know what the a kinetic energies actually are, we must convert the factors to the proper units. The velocity would have to be converted to meters per second.
However this relative comparison between these two would remain the same.
Find Ek for v1 = 50 km/hr and v2=100 km/hr
compare your answers
physice sam
i ll be so happy for ur help
4. The effect of mass on kinetic energy was not investigated in this simulation. How might the kinetic energy of a car travelling at 50 km/h compare with a more massive truck travelling at the same speed?
and the formila to be use for thoes to sam
are Ek= 1/2mv2 if any one knoe that please do and help me out ..
Kinetic energy is directly related to the mass of the object. So , at the same speed, if the mass was double, the kinetic energy would be double.
Kinetic energy is also directly related to the square of the velocity. So , with the same mass, if the velocity was double, the kinetic energy would be 2^2 or 4 times more.
For your initial question, the auto would first have a Ek represented by 1/2mv^2 or 1/2 m (50)^2.
This would be a velocity factor represented by (2500)
The same auto travelling at 100km/h would have a Ek represented by 1/2m (100^2)
This would be a velocity factor represented by (10,000)
The second auto would have 10000/2500 = 4 times the kinetic energy of the first.
In order to know what the a kinetic energies actually are, we must convert the factors to the proper units. The velocity would have to be converted to meters per second.
However this relative comparison between these two would remain the same.
Find Ek for v1 = 50 km/hr and v2=100 km/hr
compare your answers
Can you answer this math question please?
Alice has a savings account that pays 6% annual interest, compounded monthly. What is the effective annual interest rate? Round your answer to 2 decimal places.
effrate=(1+.06/12)^12-1=(1+.005)^12-1=
(1.005)^12-1=1.0616778-1
=.061677*100=6.1677%, 2 decimal place would be 6.17%%0D%0A
effrate=(1+.06/12)^12-1=(1+.005)^12-1=
(1.005)^12-1=1.0616778-1
=.061677*100=6.1677%, 2 decimal place would be 6.17%%0D%0A
Standard Deviation???????????????
1)The average temperature in an american state was recorded as 98.7 F with a standard deviation of 0.7 F. If this is a normal model what percentage of the towns in this state were below 97 F?
Is this question simply a case of taking the Z-Score as 1.7 and reading off the table which I believe gives the answer of 0.446?
2) Species A of an animal weighs average of 50 pounds and has standard deviation of 3.3.
Species B average is 57.5 with standard deviation of 1.7.
A zoo has a species A weighing 45 pounds and B at 54 pounds. Explaining fully determine which is more underweight.
Could someone please direct me as to how i would go about finding this answer please.
You gota lurve elementary statistics questions where the question setter does not really understand statistics well enough to set questions that make any sense. Suppose the correlation scale for temperature is comparable to the size of a state?
I
Is this question simply a case of taking the Z-Score as 1.7 and reading off the table which I believe gives the answer of 0.446?
2) Species A of an animal weighs average of 50 pounds and has standard deviation of 3.3.
Species B average is 57.5 with standard deviation of 1.7.
A zoo has a species A weighing 45 pounds and B at 54 pounds. Explaining fully determine which is more underweight.
Could someone please direct me as to how i would go about finding this answer please.
You gota lurve elementary statistics questions where the question setter does not really understand statistics well enough to set questions that make any sense. Suppose the correlation scale for temperature is comparable to the size of a state?
I
Reconciling 2 or more data sets when data volume is varying and wide?
I am a real estate researcher by trade. I am doing a report on median and mean home prices
in my town over a comparable time period. i.e.- quarter to quarter and year over year.
My problem is this:
for example, in the 4th Qtr of 2009, there was 35 sales with a median price of $335,500
and a mean price of $343,960.
In Q1 of 2010 there were only 11 sales with a median of $349,900 and a mean of $368,245
My problem is comparing two or more data sets, that have a large delta in the number of sales.
In this instance, 35 versus 11. With a such a low volume of sales in Q1 I would think that the data is more volatile, yes?
Is there a formula or solution to
in my town over a comparable time period. i.e.- quarter to quarter and year over year.
My problem is this:
for example, in the 4th Qtr of 2009, there was 35 sales with a median price of $335,500
and a mean price of $343,960.
In Q1 of 2010 there were only 11 sales with a median of $349,900 and a mean of $368,245
My problem is comparing two or more data sets, that have a large delta in the number of sales.
In this instance, 35 versus 11. With a such a low volume of sales in Q1 I would think that the data is more volatile, yes?
Is there a formula or solution to
Cumulative Frequency?
A random variable X is uniformly distributed between 0 and 1. Two independent observations are made,X1 and X2. Take (X1,X2 ) as a point on the lines X1 X2 =Y in a cartesian plane. X1 X2 =Y is triangular.
(a) show that , for 0 Y 1, P( X1 X2 Y)= Y^2
(b) show that , for 1 Y 2, P( X1 X2 Y)=1- (2-Y)^2
I know that f(x)=1 for 0 x 1 since X is uniformly distributed. But how do I solve (a)?
Can anyone show me the solution for (a) only so that I could solve (b) myself?
Is Y defined to be the random variable X1 X2? What is Y2? P( X1 X2 =Y) makes no sense, you cannot have the probability of a random variable being equal to another random variable.
Please post the question exactly as it is writen from wherever you got it from.
Note: Yes, the random variable Y = X1 X2 does follow a triangular distribution. Its pdf is equal to y if , 2 - y if and zero otherwise.
(a) show that , for 0 Y 1, P( X1 X2 Y)= Y^2
(b) show that , for 1 Y 2, P( X1 X2 Y)=1- (2-Y)^2
I know that f(x)=1 for 0 x 1 since X is uniformly distributed. But how do I solve (a)?
Can anyone show me the solution for (a) only so that I could solve (b) myself?
Is Y defined to be the random variable X1 X2? What is Y2? P( X1 X2 =Y) makes no sense, you cannot have the probability of a random variable being equal to another random variable.
Please post the question exactly as it is writen from wherever you got it from.
Note: Yes, the random variable Y = X1 X2 does follow a triangular distribution. Its pdf is equal to y if , 2 - y if and zero otherwise.
Please help me answer this math question?
The sum of the interior angles of a poly lies between 8900 degrees and 9100 degrees. How many sides does the polygon have?
let n = number sides to a polygon
Sum of the interior angles = 180(n-2)
8900
let n = number sides to a polygon
Sum of the interior angles = 180(n-2)
8900
Question about dinosaurs and evolution?
I may sound ignorant here, but my child likes watching a show called
Could anyone please help me with this math question?
What is the smallest number of satellites that would be able to rebroadcast signal from a single station on Earth so that every part of the equator could receive the signal? Provide an explanation as well as any necessary diagrams. (Assume that Earth is a perfect sphere when answering this question.) Note: The farther the satellite is from Earth, the more of Earth
Please help, why won
No graphing occurs on my TI-83 calculator.
After I put the numbers in L1 and L2 I press 2nd 1 and 2nd 2 (entering both times) to get both L1 and L2 on the screen. Then I go to the plots and turn the first one on and pick which graph I want. When I press graph nothing ever happens. I don
After I put the numbers in L1 and L2 I press 2nd 1 and 2nd 2 (entering both times) to get both L1 and L2 on the screen. Then I go to the plots and turn the first one on and pick which graph I want. When I press graph nothing ever happens. I don
Math question for help?
what is 89/(3 7)
8.9
89/10=8.9
8.9
8.9
89/10 or 8.9 divide bottom into top 10 goes into 89 8.9 times
Yahooer is right because 89/(3 7) = 89 / 10 = 8.9
the answer is
8.9 or 8 remaining 9
8.9
89/10=8.9
8.9
8.9
89/10 or 8.9 divide bottom into top 10 goes into 89 8.9 times
Yahooer is right because 89/(3 7) = 89 / 10 = 8.9
the answer is
8.9 or 8 remaining 9
Integrate sqr.rt(2(1-cosx)) dx from 0 to 2pi using trig identities?
So far the solution has been pretty elusive. Any detail or hints you could provide would be greatly appreciated.
Thanks!
The trig identity you need is
sin(x/2) = (1 - cos(x))/2
Then
2(1 - cos(x)) = 4 sin(x/2)
[2(1 - cos(x))] = [4 sin(x/2)] = 2 | sin(x/2) |
For the interval (0, 2), sin(x/2)
Thanks!
The trig identity you need is
sin(x/2) = (1 - cos(x))/2
Then
2(1 - cos(x)) = 4 sin(x/2)
[2(1 - cos(x))] = [4 sin(x/2)] = 2 | sin(x/2) |
For the interval (0, 2), sin(x/2)
Please give examples of optical instruments?
at least five examples of optical instruments which contain lenses.
There are many examples... Periscopes, binoculars, microscopes, telescopes and kaleidoscopes are just a few!!
Microscope
Telescope
Magnifying Glass
Eyeglasses
That
There are many examples... Periscopes, binoculars, microscopes, telescopes and kaleidoscopes are just a few!!
Microscope
Telescope
Magnifying Glass
Eyeglasses
That
Light and lenses, how the image form?
under what condition would the lens form an image that is smaller than the object?
This would depend on which type of lens you are using. For a normal double convex lens, the image is smaller than the object if the object is placed beyond the principal focus of the lens.
This would depend on which type of lens you are using. For a normal double convex lens, the image is smaller than the object if the object is placed beyond the principal focus of the lens.
Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm^3 at 27
Calculate the atomic radius of Pd.
A. 138 pm
B. 1.95 x 10^-8 nm
C. 1.95 x 10^-8 cm
D. 154 pm
E. 0.109 nm
Density = mass / volume
There are 4 atoms to the unit cell in a fcc.
(4*atomic mass /6.02 x 10^23) = mass of unit cell
(4*106.42 g/mol) / (6.02 x 10^23) = 7.07 x 10^-22 g
Density = mass/volume V = mass / density
V = 7.07 x 10^-22 g / 12.0 g/cm
V = 5.89 x 10^-23 cm
For the FCC configuration, 4r = a*2
a = 4r /2, also V (cell) = a
a = 5.89 x 10^-23 cm
a = 3.89 x 10^-8 cm
a = 4r /2 ...........where r = atomic radius
3.89 x 10^-8 cm = 4r / 2
r = 1.38 x 10-8 cm
1 cm = 1 x 10^10 pm
1.38 x 10^-8 cm * (1 x 10^10 pm / 1 cm) = 138 pm
r = 138 pm, answer A
A. 138 pm
B. 1.95 x 10^-8 nm
C. 1.95 x 10^-8 cm
D. 154 pm
E. 0.109 nm
Density = mass / volume
There are 4 atoms to the unit cell in a fcc.
(4*atomic mass /6.02 x 10^23) = mass of unit cell
(4*106.42 g/mol) / (6.02 x 10^23) = 7.07 x 10^-22 g
Density = mass/volume V = mass / density
V = 7.07 x 10^-22 g / 12.0 g/cm
V = 5.89 x 10^-23 cm
For the FCC configuration, 4r = a*2
a = 4r /2, also V (cell) = a
a = 5.89 x 10^-23 cm
a = 3.89 x 10^-8 cm
a = 4r /2 ...........where r = atomic radius
3.89 x 10^-8 cm = 4r / 2
r = 1.38 x 10-8 cm
1 cm = 1 x 10^10 pm
1.38 x 10^-8 cm * (1 x 10^10 pm / 1 cm) = 138 pm
r = 138 pm, answer A
The Difference Between a Micro Biologist and an Infectious Disease Specialist?
I would like to know what is the difference between a microbiologist and an infectious disease specialist in terms of what they do.
A microbiologist may deal with many things that have nothing to do with diseases. Microbiologists might study bacteria in the ocean, in the soil, in the atmosphere or anywhere else. The vast majority of bacteria are not pathogenic.
A microbiologist may deal with many things that have nothing to do with diseases. Microbiologists might study bacteria in the ocean, in the soil, in the atmosphere or anywhere else. The vast majority of bacteria are not pathogenic.
In the physics laboratory, Oscar measured the resistance between his hands to be 1.8 k
In the physics laboratory, Oscar measured the resistance between his hands to be 1.8 k. Being curious by nature, he then took hold of two conducting wires that were connected to the terminals of an emf with a terminal voltage of 100.0 V.
(a) What current passes through Oscar?
answer in mA
(b) If one of the conducting wires is grounded and the other has an alternate path to ground through a 15- resistor (so that Oscar and the resistor are in parallel), how much current would pass through Oscar if the maximum current that can be drawn from the emf is 0.98 A?
answer in mA
please help me out with hw..best answer 10pts...thanks :)
Given Ro=1.8k, Vs=100.0V
(a) Find current using Ohm
(a) What current passes through Oscar?
answer in mA
(b) If one of the conducting wires is grounded and the other has an alternate path to ground through a 15- resistor (so that Oscar and the resistor are in parallel), how much current would pass through Oscar if the maximum current that can be drawn from the emf is 0.98 A?
answer in mA
please help me out with hw..best answer 10pts...thanks :)
Given Ro=1.8k, Vs=100.0V
(a) Find current using Ohm
Calculus problem...have tried solving it but couldn
1) find the point on y^2=2x closest to (2,4).
2) prove that X^3 ax-b=0 has exactly one solution when a 0. a?
Thanks for ur time :)
did you try ???
2) starts low and ends high and the slope function is 3x a
2) prove that X^3 ax-b=0 has exactly one solution when a 0. a?
Thanks for ur time :)
did you try ???
2) starts low and ends high and the slope function is 3x a
Went ahead on ritalin treatment from what doctor said?
i was perscrbed 5mg once a day and i got really impatient because it wasnt working so i started taking 10mg twice a day. it is working great for me.. but when i go back i am afraid to tell him because i dont know if he will believe me or not. my husband is going with me to verify the positive difference. i am going to be honest but will this make my doctor distrust me??
Increasing the dosage of ANY medication, but especially that of a Schedule 2 controlled substance is VERY dangerous. Just because it
Increasing the dosage of ANY medication, but especially that of a Schedule 2 controlled substance is VERY dangerous. Just because it
Can someone please help me with this issue regarding an employment drug test?
I went to a job site today and got hired for a landscaping company. I was hired, however, I was told to stop at a particular urgent care site on the way home for a drug test. I have only smoked marijauna twice in the last month and both times were only a few bowls. The only problem is that the most recent time was only ten days ago. The type of test that I was given was a urine test where I think they were going to put it on some multicolored strip of paper. Will someone let me know if I have ANY hope for passing the test. Also does anyone know how long it will probably take them to notify me and how I might be notified. Thanks for the help.
After searching multiple websites the following information is the standard, the most comphrehensive,
After searching multiple websites the following information is the standard, the most comphrehensive,
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