Science & Mathematics - 3 January 2007

In the van der Waals equation


"R" is the gas constant (0.0820574 L atm mol-1K-1) and "V" is the volume in litres of "n" moles of gas at the temperature "T" in Kelvin; "a" and "b" are constants which are dependent upon the gas. Calculate the pressure, P, for 2.36 moles of argon for which a is 1.34 L2 atm mol-2 and b is 0.0322 L mol-1 if it is contained in a 3.24 L container at 322 K.

2007-01-03 16:03:44 · 1 answers · asked by angel 2 in Chemistry

Physics Scavenger Hunt

2007-01-03 16:03:07 · 5 answers · asked by jdrgearup 1 in Physics

Off Matrix, the red pill is you see the world as it is, the blue pill you go back to sleep and when you wake up you don't remember a thing.

2007-01-03 16:02:21 · 29 answers · asked by amazon 4 in Medicine

Does placement of a headache tell you the cause of the pain?

2007-01-03 16:00:33 · 3 answers · asked by Anonymous in Medicine

x> -1
y is less then or equal to -3

2007-01-03 15:56:27 · 4 answers · asked by Anonymous in Mathematics

2007-01-03 15:55:22 · 6 answers · asked by ushankumara 1 in Engineering

2007-01-03 15:54:44 · 7 answers · asked by Kimmy 2 in Zoology

2007-01-03 15:53:31 · 2 answers · asked by Bel Mar 1 in Chemistry

Solve the equation. Check the solution.


5/14 + 2/7x = 1 5/42

2007-01-03 15:50:38 · 18 answers · asked by Anonymous in Mathematics

I've got to construct a model of a molecule of neon for my science class, but, and please forgive my ignorance, I don't know what the hell I'm doing. I know there are 10 electrons on the two energy shells, but I don't know what to put inside the nucleus. I was thinking 10 protons and 10 neutrons, but I'm not sure at all. Thanks in advance for any help.

2007-01-03 15:49:32 · 4 answers · asked by Anonymous in Chemistry

In both you have 2 truth-values, you can built truth-tables...
So what is the diference between boolean algebra and classical sentential calculus?

2007-01-03 15:48:28 · 5 answers · asked by Dante 2 in Mathematics

HELLO. school has started up again. so that means my questions begin to appear again. please help me!!!!! thanks!!

Hot air balloons are based on a very basic scientific principle: warmer air rises in cooler air. Why do you think hot air rises in cooler air?

What is the difference between pressure and weight?

2007-01-03 15:48:04 · 3 answers · asked by Anonymous in Chemistry

if an object moves closer to a lens, the focal point changes. Both cameras and the human eye need to adjust their focus for objects that are closer or farther away, but they do it in different ways. How do they do it?
(pick the correct answer)
a) The human eye is able to move the lens forward or backwards slightly, changing the focal length. In a camera, the lens changes shape when you push the focus button.
b) The human eye changes the shape of the lens and the camera moves the lens forward or backward
c) the human eye is able to move the lens forward or backwards slightly, changing the focal length. In a camera, the diaphragm opens and closes to change the focal length.
d) Cameras focus by changing the lens that light passes through. The human eye focuses by changing the shape of the lens

2007-01-03 15:46:38 · 4 answers · asked by cutie_pie 1 in Other - Science

2007-01-03 15:45:50 · 3 answers · asked by Antonio l 1 in Biology

2007-01-03 15:44:44 · 7 answers · asked by Anonymous in Medicine

If you were in the back of a spaceship that was going the speed of light, but you run to the front of the ship...would you be going faster than the speed of light?

Oh...another question...how can a fly just fly around inside a moving car without smashing into the back window?

Thanks!

2007-01-03 15:44:32 · 12 answers · asked by Da Phantom 2 in Astronomy & Space

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2007-01-03 15:43:55 · 7 answers · asked by lover24 2 in Other - Science

2007-01-03 15:43:46 · 9 answers · asked by Kristina C 1 in Geography

it needs to be a desert!!!!!

2007-01-03 15:43:23 · 1 answers · asked by shelly528293 2 in Geography

I'd like something that I can really go build in a backyard or roottop and get some perceivable change in water temperature.

2007-01-03 15:41:35 · 5 answers · asked by libre 2 in Physics

Given a hypothetical planet smaller than earth but otherwise the same, is it possible to still have a 24 hour day... as in make it so that the planet still takes 24 hours to make a complete rotation.

Asking it a different way for more clarity....

If the size of the planet is different but I still want a 24 hour day, what else (if anything) would I need to change to my hypothetical planet to make a 24 hour day possible. Or can I simply change the rotational speed of the planet without having to change anything else... In other words, would changing the rotational speed cause other problems (gravitational shifts, weather problems, etc.) or can I simply have a smaller planet and set the rotational speed at whatever I need to ensure the 24 hour day without any other consequences.

If there is a consequence to adjusting the rotational speed, is there anything that can conteract that (such as the presence of another moon or different distant from the sun or other factors.)

2007-01-03 15:41:01 · 9 answers · asked by honsmordin 1 in Astronomy & Space

Massive breaking of glasses? Some unexpected coordinated vibration that destroys bridges? A weather change? :P

2007-01-03 15:37:23 · 9 answers · asked by libre 2 in Physics

which one
right
not a triangle
acute
obtuse

2007-01-03 15:35:52 · 7 answers · asked by Chris 1 in Mathematics

1000s of sighting every year. people saying they have been abducted.is it time to try to shoot them down. I think so. there up to something. I dont think there here just sight seeing. I saw one in broad daylight once.a large silver saucer shaped craft hovering right above this building

2007-01-03 15:34:13 · 8 answers · asked by Anonymous in Astronomy & Space

Say , if a rigid planet is rotating with the angular velocity " W" such that W> (R/g)^(1/2) , (R = radius of planet, g = acceleration due to gravitational force). Then according to the equation g'= g-(W^2 R), the value of g' will be negative and does a negative force of gravity. My question is that am I faultering in my assumptions?

2007-01-03 15:33:24 · 6 answers · asked by vanchit 2 in Physics

2007-01-03 15:31:23 · 3 answers · asked by Liz M 1 in Medicine

like what would it be in a definition?

2007-01-03 15:28:17 · 1 answers · asked by u soo kyoote!!! 2 in Physics

EX. How we can instantly think of one thing, and instantly change to another thought. How we can think of an event that occurred 10 years ago to a thought that is currently happening

2007-01-03 15:26:06 · 9 answers · asked by kingpoopypants999 1 in Physics

2007-01-03 15:22:49 · 9 answers · asked by kingpoopypants999 1 in Astronomy & Space

3x^2=21,......-2x^2+1=0..............and 16/15x^2-1=0.....please show me how your work.........thanks!:)

2007-01-03 15:22:31 · 3 answers · asked by jenn 2 in Mathematics