Physics - December 2006

Pertaining to semiconductors.

2006-12-11 21:10:44 · 2 answers · asked by smash wit love 1

2006-12-11 21:01:21 · 3 answers · asked by Anonymous

If the force between two equal but opposite charges is 0.5 N, when they are 20 cm apart, calculate the magnitude of the charges.

2006-12-11 20:48:40 · 3 answers · asked by Anonymous

The case in question is the world trade center. I'm trying to debunk some people who are claiming that the windows blowing out as the building collapses indicate explosives. I believe this is caused by air pressure, however the conspirator has stated that it can only move as fast as the force pushing it, so just how fast will air pressure move if there is a sudden massive increase in air pressure?

2006-12-11 20:40:14 · 2 answers · asked by Anonymous

thanks :D

2006-12-11 20:09:03 · 1 answers · asked by pigley 4

pleaes give me details on:
the purpose of the parachute
the flight of parachute
operation of the parachute
the speed of parachute
the risk of parachute flying

2006-12-11 19:43:43 · 4 answers · asked by Anonymous

I had this agruement with this dummie once. Is it gravity or centrifugal force that helps strech the pizza dough? I say centrifugal force.

2006-12-11 19:19:18 · 10 answers · asked by Anonymous

2006-12-11 19:15:59 · 8 answers · asked by Anonymous

2006-12-11 18:55:20 · 14 answers · asked by avanthi 2

2006-12-11 18:42:14 · 6 answers · asked by Anonymous

Would the sandwich get heavier on the way down to the ground? Could it injure someone if it hit them?

2006-12-11 18:15:53 · 19 answers · asked by kittykat 1

A child in a boat throws a 6.00 kg package out horizontally with a speed of 13.0 m/s, Fig. 7-28. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 28.0 kg and that of the boat is 50.0 kg.

I could find the velocity if I had the time interval, but I dont. But there is no time interval....how can I find it?

2006-12-11 18:13:09 · 4 answers · asked by Anonymous

Is the apparent height of the bird more,less or equal than its real height for the fish???????????????

2006-12-11 18:06:18 · 6 answers · asked by Anonymous

was gravity lighter when the dinisours were about?

2006-12-11 17:44:52 · 7 answers · asked by derekjohnston06@btinternet.com 1

2006-12-11 17:02:42 · 3 answers · asked by bhupesh g 1

Is that possible? If so, PLEASE tell me how.

In other words, how do you find the coefficient of friction in a certain situation (provided that you do not know the force of friction, only the mass)???

Any help is appreciated... ASAP

2006-12-11 16:45:34 · 5 answers · asked by abc123 1

2006-12-11 16:40:15 · 7 answers · asked by utopiafourteen 2

The ice skater's record was 500 m with an average of 12.92 m/s. Suppose she crossed a finish line at this speed and came to a stop. If the work done by friction over a certain distance was -2830 J, what would her kinetic energy be, assuming her mass is 55 kg.

2006-12-11 16:29:51 · 2 answers · asked by maggie 1

A rocket is launched at an angle of 42 degrees above
the horizontal with an initial speed of 77 m/s,
as shown. It moves for 28 s along its initial

line of motion with an overall acceleration of
25 m/s2. At this time its engines fail and therocket proceeds to move as a free body.
The acceleration of gravity is 9.81 m/s2 :

a) What is the rocket's maximum altitude?
Answer in units of m.

b)What is the rocket's total time of flight?
Answer in units of s.

c) What is the rocket's horizontal range? An-
swer in units of m.

2006-12-11 16:29:44 · 9 answers · asked by TheThing 2

I have to write a paper for Physics and I'm completely stuck!!!

2006-12-11 16:23:32 · 9 answers · asked by pswb6002 1

if any way of comunication divides in three... emisor, canal and receptor so the tree make sound waves then the emisor ( tree) and canal ( waves ) are present can we say that the tree make a sound but the receptor is missing ? or that waves become sound only if a receptor is present ?? bottom line, does it make a sound??

2006-12-11 16:02:17 · 4 answers · asked by cano_x100pre 2

That's the whole question... Please help.

2006-12-11 15:54:31 · 4 answers · asked by abc123 1

How many revolutions per minute would a 15-m-diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point of the trip?

I don't understand under what conditions a person would feel weightless.

If someone could explain it to me, I'll be able to solve it on my own.

2006-12-11 15:45:35 · 5 answers · asked by Megan M 2

16 wooden hangers were built for US navy airships. The hangers were 300 m long and had a max height of 52 m. imagine a 40 kg block being lifted by a winch fromt he ground to the top of the hangers ceiling. if the winch does 20800 J of work in lifting the block, what force is exerted in them?

2006-12-11 15:42:53 · 1 answers · asked by maggie 1

it's such a tough class, that and chemistry. I'm never going to use all those silly facts.

2006-12-11 15:25:43 · 5 answers · asked by Potato 5

2006-12-11 15:11:18 · 1 answers · asked by doodle 1

You want to lift a 150N object up to a back of a trunk that is 1.2m high. The ramp is 5.0 m long and the coefficent of friction is 0.15. Assume it is moving at constant velocity. Find the Force applied.

can you please explain why in this problem you use the sin of theta and not the cosine?

2006-12-11 14:57:52 · 3 answers · asked by socom_lover 2

2006-12-11 14:46:07 · 13 answers · asked by Anonymous

2006-12-11 14:39:34 · 3 answers · asked by bhangraking777 1

2006-12-11 14:37:53 · 2 answers · asked by Anonymous