Physics - May 2007

A charge is placed on a spherical conductor of radius r1. This sphere is then connected to a distant sphere of radius r2 (not equal to r1) by a conducting wire. After the charges on the sphere are in equilibrium:

a. the electric fields at the surfaces of the two spheres are equal

b. the amount of charge on each sphere is q/2

c. both spheres are at the same potential

d. the potentials are in the ratio v2/v1=q2/q1

e. the potentials are in the raion v2/v1=r2/r1

if anyone could give me any hints or try and explain how to get the answer that would be great :D

2007-05-22 23:24:30 · 2 answers · asked by Anonymous

how do they make things move?how are they a reuseabale source? what causes wind & water to move & cause energy?

2007-05-22 23:17:20 · 6 answers · asked by Robert S 1

2007-05-22 22:16:53 · 4 answers · asked by kassabo5959 1

2007-05-22 21:09:52 · 5 answers · asked by Anonymous

Explain what color would result when you mix the following
-blue and yellow pigment


Im sure its not red green or white

2007-05-22 19:13:44 · 12 answers · asked by J39P 1

can anyone tell me as much info on him as possible

2007-05-22 18:38:42 · 3 answers · asked by Anonymous

well i have found and discovered something to challange the existing theory of photoelectric effect and have given a new nature of light which denies its quantum nature(only those person required to answer who have specialised knowledge and person who know any such people is most welcome.

2007-05-22 18:17:41 · 1 answers · asked by umesh the unconventional 2

from the physics point of view and dealing with static equilibrium...

2007-05-22 17:58:24 · 11 answers · asked by a.n. 1

i know how spark produces ... but can any one tell me that wat really it is?
& wat is goin on there at atomic level when this happens

2007-05-22 17:55:19 · 4 answers · asked by Anonymous

2007-05-22 17:42:14 · 3 answers · asked by vags 1

2007-05-22 17:33:05 · 3 answers · asked by Anonymous

if magenta light shines through a cyan filter, what color would appear on a white screen?

2007-05-22 17:29:41 · 4 answers · asked by Anonymous

Two physics students have been selected to accompany astronaughts in a mission to space. they have to come up with a experiment to find the acceleration due to gravity on the moon.

Describe the following;

-The equipment needed.

- What needs to be measured

- What procedure

- What equations are needed to find accel due to grav on moon

for equipment I could only think of maybe a scale...

2007-05-22 17:21:29 · 3 answers · asked by Anonymous

I'm looking into a light for my closet. Fluorescents in general use less than an indesant. However I'm usually in my closet for only 1 min. at a time. What would be more efficient?

2007-05-22 15:47:41 · 11 answers · asked by Anonymous

You are in a vehicle traveling at the speed of light. Its getting dark out so you turn your headlights. Will they work? Explain your answer.

2007-05-22 15:47:32 · 11 answers · asked by Anonymous

2007-05-22 15:46:33 · 1 answers · asked by Giggly Giraffe 7

explain the answer refer to the pressure and how become that difficult

2007-05-22 15:32:04 · 6 answers · asked by tgmahkota55 1

if so it offers resistance how much wil it offer??

2007-05-22 15:07:50 · 8 answers · asked by boobalan s 2

or physics is always based on mathmatic?

2007-05-22 14:21:02 · 16 answers · asked by Anonymous

the planet is placed by its mass so if it's weight changes we souldd move right

2007-05-22 14:01:06 · 3 answers · asked by brieon 1

What are the differences in classes of levers (third, second, and first class) in terms of effort force, effort resistance, and resistance distance?

2007-05-22 13:49:48 · 1 answers · asked by Anonymous

A bullet shot straight up to its starting point in 10s. Its initial speed was:?
a. 49 m/s
b. 9.8 m/s
c. 98 m/s
d. 32 ft/s
e. 24.5 m/s

How do i find the answer?? I can only choose 1

2007-05-22 13:49:06 · 5 answers · asked by Anonymous

Amys favorite games is marbels. Her favorite marble is a large steel marble with a mass of 32g. She shoots it with a speed of 24cm/s directley at a stationary, smaller glass marble with a mass of 15g. After the collision, the glass marble moves ahead with a speed of 30cm/s .

If this collision had been perfectly elastic, determine the resulting velocities of both the glass and the steel marbles.

2007-05-22 13:07:01 · 2 answers · asked by K_K 1

2007-05-22 13:01:18 · 4 answers · asked by Anonymous

The age old question.

2007-05-22 12:26:41 · 12 answers · asked by Anonymous

Part 1 - With what initial velocity were the keys thrown?
Part 2 - What was the velocity of the keys just before they were caught? (Take upward as the positive direction.)

2007-05-22 12:15:28 · 1 answers · asked by Anonymous

We place an object (say, steel cube) inside hot sperical shell,
which has no sources of light, other than blackbody radiation,
and wait until thermal equiliblium settles inside the shell.

After that we try to make a picture of the object through
small hole in the shell using infra-red camera.

2007-05-22 10:05:07 · 2 answers · asked by Alexander 6

Could the theory that when things get to their hottestpoint they will cool down enough to create another Ice Age? Will a physics major know? Probably. {please send me an answer in this forum.} Jennifer.

2007-05-22 09:54:20 · 3 answers · asked by Jennifer B 1

My mom claims that when she was young, the sound barrier was broken about once or twice a year. Now, there is not one. This seems like a good question to ask, so please, can somebody tell me why?!?

2007-05-22 09:38:45 · 13 answers · asked by Anonymous

1) 0.0m/s2 , (2)1.0m/s2, or 4.9m/s2, or 9.8m/s2 and the accleration of gravity is 9.8m/s2.

2007-05-22 07:42:51 · 4 answers · asked by margoretewhitfield 1