Physics - November 2006

2006-11-04 01:57:51 · 4 answers · asked by goring 6

2006-11-04 01:36:35 · 16 answers · asked by Peejay 2

1) name a point inside a lens through which a ray of light goes undeviated
2) a 1 cm high object is placed at a dist. of 2f from a convex lens. What is the height of the image formed.
3) A convex lens_____ a parallel beam of light while concave lens _____ a parallel beam of light.
4) give one condition when there is no refraction of light even when it passes from one medium to another.
5) name the muscle which controls the focal length of the eye lens.

2006-11-04 01:11:46 · 6 answers · asked by rmaakan 4

My question is what happens to the quality of sound when its frequency is increased. Audible range is between 20Hz-20000Hz. But why 21000Hz is not audible.

2006-11-04 01:10:54 · 6 answers · asked by anurag 1

General relativity

2006-11-04 00:38:18 · 5 answers · asked by goring 6

A crate of mass 11.5 kg is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100 N parallet to the incline, which makes an angle of 21 degrees with the horizontal. The coefficient of kinetic friction is .4, and the crate is pulled 4.05 m.

I've tried to find the amt of mechanical energy lost due to friction using {change in kinetic + change in potential = change in thermal), but my answer is not coming out correctly. Any suggestions?

2006-11-04 00:37:28 · 2 answers · asked by krisski 3

iam lecturer in india(vizag)

2006-11-04 00:31:31 · 6 answers · asked by ravi 2

2006-11-03 23:56:09 · 4 answers · asked by Palestini Detective 4

2006-11-03 23:52:37 · 21 answers · asked by Vampire 2

A crate of mass 11.5 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The pulling force is 100N parallel to the incline, which makes an angle of 21.0 degrees with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.05 m.

There are five questions to answer, but I need the final velocity in order to figure them out. I'm stuck. Can you help?

2006-11-03 23:02:39 · 3 answers · asked by krisski 3

physics

2006-11-03 21:18:53 · 6 answers · asked by tinu 1

2006-11-03 20:30:49 · 2 answers · asked by Anonymous

2006-11-03 19:16:18 · 5 answers · asked by Anonymous

A crate is pulled by a force(parrallel to the incline) up a rough incline. The crate has initial speed of 1.49 m/s. The crate is pulled a diestance of 7.46 m on the incline by a 150 N force. The acceleration of gravity is 9.8 m/s^2 and the angle is 28 degrees. The friction coefficient is 0.27. What is the change in kinetic energy of the crate, answer in Joules. And what is the speed of the crate after it is pulled 7.46 m? answer in m/s.
Anyone know the answers and why?

2006-11-03 19:15:36 · 4 answers · asked by polo_05_polo 1

it is related to special theory of relativity,and is relatedto twin pardox

2006-11-03 18:41:17 · 3 answers · asked by Anonymous

2006-11-03 18:39:30 · 1 answers · asked by hmmm 1

2006-11-03 18:35:45 · 4 answers · asked by Anonymous

A car weighing 6600 N moves along a level highway with a speed of 110 km/h. The power of the engine at this speed is 57kW. The car encounters a hill inclined at an angle of 9.1 with respect to the horizontal.
If there is no change in the power of the engine, and no change in the resistive forces acting on the car, what is the new speed of the car on the hill? Answer in units of km/h.

I am so confused on this problem, can anyone step me throught it and help me get an answer.

2006-11-03 18:25:22 · 4 answers · asked by polo_05_polo 1

I've been researching this for a while now and still have a hard time understanding it so I'd really appreciate explainations in your own words.
**
I've looked at the wiki articles and joop so unless you have a really amazing, easy to understand link, I'd rather just have you explain it as best you can.
**
Also, I think I understand the quantum entanglement part: what it is on its own. What I need help with is understanding how QE is used to actually "teleport" something.

Thanks :D

2006-11-03 18:12:46 · 4 answers · asked by iMi 4

2006-11-03 17:51:33 · 8 answers · asked by baby portz 1

2006-11-03 17:36:14 · 3 answers · asked by Chan Fai 1

i am so afraid of door handles, cars and other metalic objects. I have to relied somebody to open the door for me evrytime when i go out.

2006-11-03 17:34:16 · 7 answers · asked by mike v 1

2006-11-03 17:11:13 · 9 answers · asked by Anonymous

why does the south pole of a magnet attract the north pole of the other magnet and viceversa???

2006-11-03 16:54:24 · 7 answers · asked by srujana G 1

Turn Helium from a liquid into a gas and back again ?
I also want to know if the process can be made portable ?

I would appreciate anyone who answers this question if they would leave an email or IM contact to come back to with any further questions I may have please ?

2006-11-03 16:46:32 · 3 answers · asked by Anonymous

2006-11-03 16:03:24 · 21 answers · asked by manbearpig 4

2006-11-03 16:00:28 · 3 answers · asked by manbearpig 4

2006-11-03 15:56:24 · 3 answers · asked by manbearpig 4

2006-11-03 15:05:04 · 16 answers · asked by Anonymous

At the surface of a freshwater lake the air pressure is 0.9 atm. At what depth under water in the lake is the water pressure 3.5 atm?

2006-11-03 14:55:27 · 5 answers · asked by Anonymous