Physics - September 2006

2006-09-23 07:58:53 · 7 answers · asked by lilv 1

How much force act on it when it reaches its peak?

2006-09-23 07:52:03 · 5 answers · asked by lilv 1

2006-09-23 07:44:54 · 9 answers · asked by disguys_dalimit 2

Imagine 2 super-strong magnets in a vacuum chamber. They're polished to a mirror fininsh and mounted in a frame that allows them to be brought together without touching At some very close proximity, the magnetic force between them becomes so strong that virtual particle pairs in the gap are torn apart before they can recombine. Positively charged particles are drawn in one direction and negatively charged ones in the other. A wire connects the 2 magnets and an inline meter begins to measure a current. Plausible scenario? Have I just revolutionized the world? ;-)

2006-09-23 07:43:56 · 3 answers · asked by AmigaJoe 3

2006-09-23 07:33:04 · 4 answers · asked by aldabok318 1

I need the inductance value of a 40Wbulb

2006-09-23 07:15:23 · 8 answers · asked by Anonymous

It really would be wonderful to have electricity available to any consumer of electricity without wires running alllllll the place, thus saving on transmission losses also!

2006-09-23 06:57:43 · 10 answers · asked by varun s 1

A curve of radius 60 m is banked for a design speed of 100 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve?

I am not sure how to solve this without knowing the mass of the car. Apparently it can be done but I am not seeing it in my book. In every equation I either have to have the mass or have known the mass of the car in order to calculate this.

Can I work backwards from calculating the banking angle?

Any ideas...?

2006-09-23 06:51:28 · 2 answers · asked by Anonymous

the answer is false. but i don't know why. can anyone explain?

2006-09-23 06:41:18 · 8 answers · asked by Anonymous

2006-09-23 06:36:26 · 4 answers · asked by Jayu P 1

A train is traveling at 5.00 X 10^1 meters per second. The resistance between the train and the track is 73.0 newtons. If air resistance can be ignored, determine the horsepower needed to power the engine.

2006-09-23 06:34:21 · 3 answers · asked by Johnny 3

Sagar E

2006-09-23 05:45:25 · 7 answers · asked by Anonymous

If it was possible to open a window at 30,000 ft in a plane which was travelling at 1500 miles an hour and fire a rifle and the bullet also travels at 1500 miles an hour what would happen to the bullet. Would it just remain in the barrel or would it exit the barrel and now be travelling at 3000 miles and hour

2006-09-23 05:40:11 · 14 answers · asked by jas 2

Sagar E

2006-09-23 05:33:13 · 9 answers · asked by Anonymous

When things dissolve in water eg salt they fit in between the spaces between the water molecules, correct?
so would a liquid with a lower density than water allow more dissolution of the same substance eg salt?
And does it have to be liquid? whats the reason for why a low density wood is a bad solvent. I know its a stupid question but i cant get the answer!

2006-09-23 05:18:15 · 2 answers · asked by benabean87 2

1.) You stand at the top of a cliff while your friend stands on the ground below you. You drop a ball from rest and see it takes 1.2 secs. for the ball to hit the ground below. Your friend then picks up the ball and throws it up to you, such that it just comes to rest in your hand. What is the speed with which your friend threw the ball.

2006-09-23 05:13:55 · 5 answers · asked by Anonymous

2006-09-23 05:13:52 · 2 answers · asked by Chicho 1

1.)A rocket rises vertically from rest, with an acceleration of
3.2 m/sec square until it runs out of fuel at an altitiude of 1200 meter.
After this point, its acceleration is that of gravity, downward.
(A.)- What is the velocity of the rocket when it runs out of fuel.
(B.)- How long does it take to reach this point?
(C.)- What maximum altitude does the rocket reach?
(D.)- how much time (total) does it take to reach maximum altitude?
(E.)- With what velocity does the rocket strike the Earth.
(F.)- How long (total) is it in the air?

2.)If there were no air resistance, how long would it take a free-falling parachutist to fall from a plane at 3200 meters to an altitude of 350 meters, where she will pull her ripcord? What would her speed be at 250 m? (in reality the air resistance will restrict her speed to perhaps 150 km/hr.)

2006-09-23 05:11:36 · 2 answers · asked by Anonymous

2006-09-23 05:07:29 · 4 answers · asked by Jayu P 1

2006-09-23 05:06:58 · 4 answers · asked by Anonymous

objects at rest on the Earth's surface move in circular paths with a period of 24hr. why are they not considered to be "in orbit" ? what would be the length of the day to put such objects in true orbits?

2006-09-23 05:03:52 · 5 answers · asked by Anonymous

certain neutron stars(extremely dense stars) are believed to be rotating at about one revolution per second . if such a star has a radius of 20km, what must its minimum mass be so that objects on its surface will still be attracted to the star and not be "thrown off" by the rapid rotation?

2006-09-23 05:02:29 · 4 answers · asked by Anonymous

the weight of an apple near the surface of the Earth is 1N. what is the weight of the Earth in the gravitational field of the apple?

2006-09-23 05:00:46 · 3 answers · asked by Anonymous

2006-09-23 04:30:57 · 9 answers · asked by goring 6

Einstein relativitic mass increases with velocity.

However; Dr. Carezani Relativistic mass decreases as the chemical mass structure moves faster.

Newton's laws of motion indicates no change of mass as a mass structure moves.

Which laws of motion are more realistic?

2006-09-23 04:09:51 · 1 answers · asked by goring 6

2006-09-23 04:08:10 · 5 answers · asked by Anonymous

2006-09-23 03:53:04 · 3 answers · asked by Anonymous

2006-09-23 03:39:31 · 4 answers · asked by bogstench 1

What if a Meteor by the size of New York City, like in Armageddon, doesn't really collide with the Earth but just brushes-off from the Earth's atmosphere blanket, what will happen? Will that make any harm to the humans and the other creatures in that area over which this will happen? What will be the effect if it just brushes with atmosphere blanket, say about 20 or 25 kilometers away or above from the Earth's surface or the sea level, just passing through or brushing the atmosphere, but not colliding?

2006-09-23 03:37:22 · 9 answers · asked by Ahmed Yar K 2

You wouldn't be reading this, for one thing.
What other incredible things are there out there that we have yet to discover?
What might they be (let you mind wander)?

2006-09-23 03:36:08 · 15 answers · asked by Up your Maslow 4