Physics - June 2007

if someone could give a circuit and give a detailed explanation
especially the role of circuit components used therein?

2007-06-18 19:31:03 · 4 answers · asked by prism_rene 1

which of the following is more elastic(a)glass(b)rubber(c)stainless steel(d)tungston.speed of light will be minimum when passing through(a)glass(b)vaccum(c)water(d)air.another one is concerning the properties of sound waves.It is said that speed of sound depends upon elasticity,density,temperature and motion of particles of the medium of propagation.higher tha elasticity of a medium greater is the speed of the sound.i also want to know whether moist air or dry air have high density?whether speed of sound increases or decreases with high density?what is the case of light waves.please answer me .

2007-06-18 18:43:23 · 3 answers · asked by Anonymous

I read a little bit about Theory of Relativity, Albert Einstein said Newton's laws should be abandoned, is that true? But my wonder is that was Einstein's Theory based or derived from Newton's laws?

2007-06-18 17:54:32 · 10 answers · asked by Anonymous

I know that they slip because there is less friction but is there more than that. Why is ice slippery?

2007-06-18 17:45:56 · 13 answers · asked by Anonymous

2007-06-18 17:19:12 · 7 answers · asked by bornconfused 1

A Boeing 777 can accelerate from 0 to 70 m/s in about 28 seconds. Determine the average power developed by the jet engines assuming that the mass of the plane is 136,000 kg. Divide your answer by 750 to see the average horsepower developed by the engines.

2007-06-18 16:09:48 · 4 answers · asked by Mark 1

would their velocity from your perspective be the same as if you where parked and they rolled passed you going 5 miles per hour?

2007-06-18 16:02:17 · 7 answers · asked by Anonymous

The maximum speed of a person on a swing is 5.0 m/s. The person's height above the ground is 0.75 m at the lowest point. How high above the ground is the person at the highest point? (energy conservation)


Please show your work. Thanks :)

2007-06-18 15:33:04 · 6 answers · asked by Mark 1

Plllleeeeaaasse i need help!

Consider a book that weighs 15 newtons and is at rest on a flat table. How many newtons of support force does the table provide? What is the net force on the book?

2007-06-18 15:29:06 · 4 answers · asked by sally 3

A student (m = 64 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.016 s. The average force exerted on him by the ground is +19000 N. From what height did the student fall? Assume that the only force acting on him during the collision is that due to the ground.

2007-06-18 15:12:22 · 4 answers · asked by iceosiris117 1

A .200-m uniform bar has a mass of .750 kg and is released from rest in the vertical position. The spring is initially unstrained and has a spring constant k=25.0 N/m. Find the tangential speed with which end A strikes the horizontal surface.

The drawing shows three distance all equalling .100m ad there being a pivot that is frictionless. A is labeled where the horizontal distance.
Not sure if this is enough description of the picture or not!

2007-06-18 15:00:14 · 1 answers · asked by wildcherrychica1 2

2007-06-18 14:27:17 · 9 answers · asked by James H 1

the shaft of a pump starts from rest and has an angular acceleration of 3.00 rad/s^2 for 18.0s. at the end of this interval what is (a) the shafts angular speed and (b) the angle through which the shaft has turned?

2007-06-18 13:38:18 · 4 answers · asked by Anonymous

2007-06-18 13:23:46 · 5 answers · asked by rrk 2

2007-06-18 13:12:12 · 17 answers · asked by Michael F 2

2007-06-18 12:49:55 · 6 answers · asked by hotmail.stinks 1

A person is riding a bike and its wheels have an angular velocity of +20.0 rad/s. then the brakes are applied and the bike is brought to a stop. during braking, the angular displacement of each wheel is +15.92 revolutions.
(a) how much time does it take the bike to come to rest?
(b) what is the angular acceleration in (rad/s^2) of each wheel?

2007-06-18 12:34:05 · 2 answers · asked by chly1459 1

an auto race is held on a circular track. A car completes one lap in a time of 1809s, with an average tangential speed of 42.6m/s. Find (a) the average angular speed and (b) the radius of the track.

2007-06-18 12:29:50 · 4 answers · asked by Anonymous

2007-06-18 12:19:37 · 2 answers · asked by Anonymous

2007-06-18 11:33:17 · 5 answers · asked by ltlhodge 1

2007-06-18 10:52:48 · 18 answers · asked by siglo 1

A heavy flywheel is accelerated (rotationally) by a motor that proves a constant torque and therefore a constant angular acceleration alpha. The flywheel is assumed to be at rest t=0.

Find the time t sub 1 that it takes to accelerate the flywheel omega sub 1 if the angular acceleration is alpha.

And, Find the angle theta through which the flywheel will have turned during the time it takes for it to accelerate from rest up to angular velocity omega sub 1, which can be expressed in terms of all or some of the following: Omega sub 1, alpha, and t sub 1.

2007-06-18 10:38:08 · 1 answers · asked by Jamella 1

2007-06-18 10:29:29 · 3 answers · asked by John K 1

Without assistance, would it kill you or make you work twice as hard to do basicly anything.

2007-06-18 08:42:19 · 17 answers · asked by Anonymous

2007-06-18 08:03:10 · 4 answers · asked by Anonymous

I am trying to get rid of noise of 60 hz ( its continuous) from another continuous signal of 61 Hz. I have been working with several methods but none of them has been 100% efficient. I am doing everything in MATLAB.

2007-06-18 07:13:18 · 4 answers · asked by Anonymous

I played so hard, put in 360 miles on my new bike. Did a charity bike run. Now I am sun burnt and wore out. It kinda feels good to sit here at work and rest...

2007-06-18 06:51:20 · 7 answers · asked by Anonymous

What is so revolutionary about string theory: the ideas.

-How string theory claims to unify quantum physics with gravity-- macro world.

-And why is there a recent controversy sorounding string theory? Why has it 'failed' in certain respects.

Thanks.

2007-06-18 06:17:07 · 5 answers · asked by Anonymous

2007-06-18 06:08:16 · 5 answers · asked by leena 1

2007-06-18 05:55:21 · 3 answers · asked by Amy M 5