Physics - April 2007

2007-04-03 07:39:07 · 4 answers · asked by wills 1

2007-04-03 07:24:22 · 2 answers · asked by amateurgrower 3

Suppose that the power supply is ideal and thus it has no internal resistor. What's the role of resistance in the process of charging a capacitor?

2007-04-03 07:16:59 · 7 answers · asked by Taha 1

in the "many universes" view of quantum mechanics, what would happen if an event occured with an irrational probability?

For example if the probability of an event occuring is 1/pi, no matter how many parallel universes are created, the probability would not be represented accurately.

How would the "many universes" theory explain this?

2007-04-03 07:08:27 · 4 answers · asked by Anonymous

thanks for the help if you know

2007-04-03 07:03:46 · 3 answers · asked by amateurgrower 3

2007-04-03 07:01:32 · 6 answers · asked by Gene Y 1

A large horizontal circular platform (M=77.1 kg, r=3.27 m) rotates about a frictionless vertical axle. A student (m=60.3 kg) walks slowly from the rim of the platform toward the center. The angular velocity ω of the system is 3.90 rad/s when the student is at the rim. Find ω (in rad/s) when the student is 1.63 m from the center.

I have no idea where to start on this problem, so any help is appreciated. Thanks.

2007-04-03 06:59:24 · 1 answers · asked by Defcon6 2

1. less
2. greater
3. the same

2007-04-03 06:43:04 · 2 answers · asked by Anonymous

1. shorter
2. longer
3. the same

2007-04-03 06:42:32 · 3 answers · asked by Anonymous

2007-04-03 05:35:55 · 2 answers · asked by onlysrija 1

A tire has a radius of 12 cm. if the tire is rotating at a constant angular speed of 30 revolutions per second, then the tagential velocity of a point on the circumference is??

a) 31.51
b) 3.08
c)22.62
d)12.55
e) 5.13

please help/explain thanks!!!

2007-04-03 05:26:36 · 1 answers · asked by Anonymous

A wheel has a diameter of 12 cm.. If the wheel is rotating at a constant angular velocity of 30 radians per seconds then the period of the rotational motion is??

1) 0.21 s
2) 0.44 s
3) 0.64 s
4) 1.56 s
5) 0.06 s

please help and explain, best answer 10 points, thank you!!

2007-04-03 05:24:45 · 3 answers · asked by Anonymous

A block of mass m is pushed against a spring that has a spring constant k. The spring is compressed by a distance d, and then the block is released. We observe that the block is launched by the spring along a horizontal frictionless surface with a final speed v.

If a second block, this one having a mass of 4m, is pushed against the spring and released, we observe that it gains a final speed of 2v. By what distance was the spring compressed in this second case?

d
2d
4d
16d
25d

2007-04-03 05:10:42 · 2 answers · asked by Anonymous

2007-04-03 05:04:18 · 2 answers · asked by Anonymous

Anyone who can will be handsomely rewarded with, er, five stars.

2007-04-03 04:44:51 · 5 answers · asked by Andrew H 2

To what height compared to earth can you jump on a planet with 4 times the radius of the Earth and a third of Earth’s average density?

If one day on this planet lasts 8 hours, how much lighter (in %) would you feel on its equator compared to the poles?

Finally, this planet is located at twice the distance as earth is from the sun, with its star eight times as massive as our sun. How long (in earth years) is one year on this planet?

2007-04-03 03:00:49 · 1 answers · asked by Tyler D 1

I know about polariods in camera but dont understand what it is ?? I know ..in windows of cars ...do you know any use of plane polarised light?

2007-04-03 03:00:43 · 5 answers · asked by Anonymous

2007-04-03 02:38:45 · 2 answers · asked by Peter M 1

2007-04-03 02:30:58 · 3 answers · asked by Sajid 1

2007-04-03 02:16:38 · 5 answers · asked by Sajid 1

2007-04-03 01:56:10 · 10 answers · asked by Maria 1

A 60kg astronaut becomes separated in space from her spaceship. She is 15.0m away from it and at rest relative to it. In an effort to get back, she throws a 500g wrench with a speed of 8.0m/s in a direction away from the ship. How long does it take her to get back to the ship?

2007-04-03 01:55:41 · 2 answers · asked by Anonymous

O= a |1><1| +a |2><2| + ib |1><2| - ib |2><1|

How do I find the normalized eigenvectors of O in the |n> basis?

2007-04-03 01:38:44 · 3 answers · asked by chica1012 2

2007-04-03 01:36:06 · 9 answers · asked by Eriec 3

2007-04-03 01:33:47 · 2 answers · asked by pkramakrishnan2001 1

okay.. time could be an abstract concept, but everything does seem to be moving in a forward motion, or atleast the mind perceives all events in a linear motion...

does this process of linear motion, which the mind perceives as time have a constant speed at which things seem to happen?

2007-04-03 01:20:33 · 9 answers · asked by x 2

A ping-pong ball covered with a conducting graphite coating has a mass of 5.0  103 kg and a charge of 4.0 µC. What electric field directed upward will exactly balance the weight of the ball? (g = 9.8 m/s2)

2007-04-03 00:23:37 · 1 answers · asked by Kelly C 1

3 application that generally use in human life

2007-04-02 19:56:34 · 6 answers · asked by cute g 1

2007-04-02 19:56:31 · 7 answers · asked by Anonymous

true or false

2007-04-02 19:48:03 · 3 answers · asked by Anonymous