Physics - February 2007

2007-02-08 04:27:40 · 2 answers · asked by joy 1

The rate of diffusion has nothing to do with the size of the molecule but rather its molecular weight. The rate of diffusion is inversley proportional to the square root of the molecular weight. As far as making tires run cooler, the specific heats and thermal conductivities are almost identical so no advantage. All gases follow the same laws of physics so far as volume and pressure are affected by temperature so no advantage. I have seen no hard evidence that it reduces oxidation under typical driving conditions. I think someone is getting rich selling something that is contained in air at an 80% level.

2007-02-08 04:23:24 · 8 answers · asked by Anonymous

h^2/8ma^2(nx^2+ny^2+nz^2)
nx,ny,nz=1,2,...

2007-02-08 04:23:10 · 2 answers · asked by zizi m 1

The basics of physics.... Newtons Laws, Vectors and such

2007-02-08 04:19:48 · 4 answers · asked by Anonymous

At one instant a bicyclist is 70 m due east of a park's flagpole, going due south with a speed of 12 m/s. Then, 20 s later, the cyclist is 35 m due north of the flagpole, going due east with a
speed of 18 m/s. For the cyclist in this 20 s interval, find each of the following.

What are the magnitude and direction of average velocity and average acceleraion?

2007-02-08 04:18:06 · 2 answers · asked by mehran_kimi 2

A rotating fan completes 1150 revolutions every minute. Consider the tip of a blade, at a radius of 19.0 cm. (a) Through what distance does the tip move in one revolution? What are (b) the tip's speed and (c) the magnitude of its acceleration? (d) What is the period of the motion?

2007-02-08 04:18:01 · 2 answers · asked by In love with love 2

2007-02-08 04:17:43 · 25 answers · asked by JSD 1

The position of an electron is given by = 3.09t - 2.62t2 + 8.31, with t in seconds and in meters. At t = 3.71 s, what are (a) the x-component, (b) the y-component, (c) the magnitude, and (d) the angle relative to the positive direction of the x axis, of the electron's velocity ?

2007-02-08 04:16:41 · 1 answers · asked by In love with love 2

2007-02-08 04:15:38 · 3 answers · asked by zizi m 1

2007-02-08 03:57:35 · 19 answers · asked by Anonymous

two masses are hanging on a meter stick suspended from its center. on the right side, an object with as mass of 155 square nuts is 11cm from the fulcrum, and on the left side, and object that balances 142 square nuts is 12 cm from the fulcrum.

2007-02-08 03:37:53 · 1 answers · asked by Anonymous

2007-02-08 03:35:35 · 9 answers · asked by zeff 1

the other side of the meter has 200 square nuts placed 9 cm from the fulcrum.

2007-02-08 03:33:30 · 1 answers · asked by Anonymous

2007-02-08 03:33:09 · 3 answers · asked by Rehan 1

A net force of 10 N accelerates a 2 kg mass over a distance of 20 m.
(a) What is the work done by this net force?
J
(b) What is the increase in kinetic energy of the mass?
J

2007-02-08 03:27:10 · 2 answers · asked by bibun 2

2007-02-08 02:52:25 · 6 answers · asked by manda lou 1

I have a platinum ring and when i take this ring near the magnet it attracts the ring? why?

2007-02-08 02:34:36 · 10 answers · asked by Rajesh 1

in some places it appeared to be green ,is it a reflection ? give me full details.

2007-02-08 02:31:08 · 22 answers · asked by Neo 2

Do you think it could be possible to reanimate the dead? The soul or 'personage' would be gone, of course, but what about the brain activity, habits, eating, etc.?

2007-02-08 02:20:04 · 5 answers · asked by hopem 2

Namely, going back in time.

2007-02-08 02:18:30 · 9 answers · asked by hopem 2

2007-02-08 02:07:05 · 2 answers · asked by D. P 1

2007-02-08 02:03:36 · 17 answers · asked by joel k 1

2007-02-08 01:50:34 · 24 answers · asked by Anonymous

2007-02-08 01:39:57 · 1 answers · asked by neharikamadsci 1

I'm a big physics buff. I enjoy learning about new physics ideas and phenomenon. However, everytime I browse through the physics section of Yahoo Answers, all I find is very general and repetitive high school physics questions.

I enjoy being a mentor and teaching as much as the next person, but homework help should stay in the "Homework Help" section.

It really seems like a lot of these 'students' dont even give half an attempt at coming up with their own answer, they just take advantage of the resource available.

I'd like to fix this, does anyone have any ideas?

annoyed,
Chris

2007-02-08 01:38:19 · 6 answers · asked by Anonymous

If the wings give lift then when upside down the plane should go down and not be able to stay aloft.

2007-02-08 01:34:57 · 11 answers · asked by doc 1

2007-02-08 01:26:43 · 6 answers · asked by ian g 1

help please!!

2007-02-08 01:23:18 · 4 answers · asked by ♣ мчα ♣ 3

Bullets obviously start at rest.So,how much time does it take to reach maximum velocity.

2007-02-08 01:19:57 · 6 answers · asked by Anonymous

2007-02-08 01:07:43 · 12 answers · asked by shelbyfacee 1