Physics - June 2007

i am working with starved air incinerator for my project . so can any one please tell me what is starved air condition. how it should be maintained

2007-06-21 20:34:12 · 2 answers · asked by dhivvya r 1

I have a question:

If an object is sliding on the earths surface:

and slows down due to kinetic friction, and only the object is
taken as the system, the kinetic force is taken as the external force.

But if both the aerth and the object are taken as a system, is the kinetic force an external or internal force?

Can the frictional force change the momentum of the two body system?

2007-06-21 20:32:33 · 3 answers · asked by Anonymous

2007-06-21 19:22:17 · 13 answers · asked by lareab 1

Everyone knows that electron have negative charge. But why? Please help me here, I am on dead end.

2007-06-21 19:14:27 · 20 answers · asked by Anonymous

THEY BALL UP AND BOUNCE AND ROLL AROUND AS IF INSULATED FROM THE HEAT! WHAT IS HAPPENING TO KEEP THE WATER DROPLETS FROM BECOMING STEAM?

2007-06-21 19:10:49 · 2 answers · asked by Harold E 2

2007-06-21 19:03:41 · 4 answers · asked by maddipatla r 1

2007-06-21 18:24:50 · 5 answers · asked by lareab 1

Why was Albert Einstein famous, I mean, he didn't make many discoveries. Do you think he's famous because of the equation E=MC^2?
Please answer as quick as possible.
Thank you!!

2007-06-21 18:08:23 · 7 answers · asked by Anonymous

I know the internet says no. I know all educated physicists and engineers say no. I know the second "law" of thermodynamics says no. I also have studied maxwells demon and its complications. What I want to know is if you agree with my scenario....

A box of air holds nitrogen at standard temperature pressure. No energy enters or leaves the box. The energy in the box is at maximum entropy (well mixed) with no hot or cold spots.

Now at any given time in this box, 2 molecules of nitrogen will be passing each other. The difference in their velocities is a given amount of mechanical energy. If an instrument was made small enough via nano technology this energy could be captured. After a great length of time, the energy received by this device would out weigh the amount of energy used to make the device. And thus decreasing the entropy of the universe, without a net addition of energy.

Criticism and Opinions appreciated, Thanks to all.

2007-06-21 18:03:03 · 3 answers · asked by ericnutsch 5

2007-06-21 17:42:15 · 2 answers · asked by eclare 2

Everything I find about units of measurement are either on a smaller scale up to a mile (or kilometer, depending on the source), then it jumps up to cosmic scales, what's in between?

2007-06-21 17:39:05 · 5 answers · asked by n eop iter 1

exp. future/past. Going back in time 1800's future 3000. Not asking about flying from one destinantion exp. Japan to America. I know there is a 16 hr difference there.

2007-06-21 17:30:47 · 10 answers · asked by apheelio 1

2007-06-21 17:29:57 · 13 answers · asked by zilch 1

Is it harmful in any way? I threw it all, millions of little silver balls, out the window.

2007-06-21 16:41:09 · 6 answers · asked by ania 1

Do all wavelengths of light travel at the same rate?

2007-06-21 16:24:02 · 12 answers · asked by RL 1

Okay; so we do know what the speed of light is.

But how did scientists manage to measure it in the first place?
Anyone knows the actual way they did it?

2007-06-21 16:10:00 · 5 answers · asked by Bunnyz C 2

2007-06-21 15:57:02 · 10 answers · asked by scott s 1

...because, when you think about it, less dense hot air rises over cool air, therefore it would seem warm air (that makes more a/c power needed) should enter the third floor and leave out the window. Meanwhile cool air, being dense, would supposedly fall below it, leaving the second and first floor needing less a/c (thus hopefully lowering energy bills).
Would this help and, if so, by about how much (in apx. % energy reduction needed to cool a house)?

2007-06-21 15:19:21 · 3 answers · asked by M S 5

After watching a futuristic in-space movie, I wondered what if.......If you were in a vehicle - any type of vehicle - that could travel the speed of light, and you turned on the headlights, what would happen?

2007-06-21 13:48:51 · 8 answers · asked by Derail 7

If AC current is a constant reversal of electron flow direction, how can there be a distinct hot and neutral wire? The electrons flow equally in both directions, so how can they be said to flow from one wire to the other?

2007-06-21 13:27:03 · 5 answers · asked by Anthony R 2

A crate of mass m1 on a frictionless inclined plane is attached to another crate of mass m2 by a massless rope. The rope passes over an ideal pulley so the mass m2 is suspended in air. The plane is inclined at an angle = 36.9°. Use conservation of energy to find how fast crate m2 is moving after m1 has traveled a distance of 1.4 m along the incline, starting from rest. The mass of m1 is 12.4 kg and the mass of m2 is 16.3 kg.

2007-06-21 12:39:34 · 1 answers · asked by Anonymous

A team of dogs drags a 123 kg sled 1780 m over a horizontal surface at a constant speed. The coefficient of friction between the sled and the snow is 0.209. The acceleration of gravity is 9.8 m/s^2.

1)Find the work done by the dogs. Answer in units of kJ.
2)Find the energy lost due to friction. Answer in units of kJ.

2007-06-21 12:35:07 · 3 answers · asked by Anonymous

I read somewhere that they have a blueprint of a super bomb that could wipe out all of mankind.

2007-06-21 12:03:53 · 7 answers · asked by Anonymous

I keep having this dream about this boy i like and the frist dream was that he went to ask me out and i sayed "yes". The second dream its that he told his friend to ask me do i want to go out with him and i sayed "yes" again. And the third dream its that his friend told him "look at your girlfriend and there was only me and my friend but she was in front of me and when i turn around i saw him smiling =) so what does that suppose to mean? please help

2007-06-21 11:07:56 · 6 answers · asked by ♥LoL SmiLey FaCe♥ 2

A) the force is twice as weak
B) the force is 3 times as weak
C) the force is 4 times as weak
D) the force is 8 times as weak

If the distance between two objects increases by 4 times,what happens to the force of attraction between the two objects?
A)twice as weak
B)4 times as weak
C) 3 times as weak
D) eight times as weak

2007-06-21 11:05:41 · 5 answers · asked by Amy M 5

can any one explain the physics behind it??

2007-06-21 10:41:23 · 7 answers · asked by jboy 2

and the materials that make up each of those, what are those made up of?

2007-06-21 09:36:05 · 15 answers · asked by Christian W 1

And why don't the closer lights twinkle?

2007-06-21 09:11:44 · 7 answers · asked by Jess 3

At 25C the heat of fusion of aluminum is 10.6 kJ/mol and the heat of sublimation is 326.4 kJ/mol. What is the heat of vaporization of aluminum at 25C?

2007-06-21 08:58:17 · 1 answers · asked by Anonymous

They are available. Heard about them on Coast to Coast AM with George Noory. Doubt that they work.
Have you used one and what were the results?

2007-06-21 08:22:55 · 11 answers · asked by Anonymous