A cup of hot coffee is placed inside a large, well-insulated container. Over a five minute period, the entropy of the cup decreases by 100 J/K. What can you say about the entropy of the air surrounding the cup?

A rocket blasts off vertically from rest on the launch pad with a constant upward acceleration of 2.10 m/s2 . At 30.0 s after blastoff, the engines suddenly fail, and the rocket begins free fall.

What is the height of the rocket when the engine fails?

Find the magnitudes of the rocket's velocity and acceleration at its highest point.

How long after it was launched will the rocket fall back to the launch pad?

An ant walks on a piece of graph paper straight along the x axis a distance of 10.0 cm in 1.90s . It then turns left 30.0 ? and walks in a straight line another 10.0 cmin 1.70s . Finally, it turns another 70.0 ? to the left and walks another 10.0 cm in 1.60s .

1.Determine the x component of the ant's average velocity.

2.Determine the y component of the ant's average velocity

3.Determine the magnitude of ant's average velocity.

4.Determine the direction of ant's average velocity.

A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 3.1m/s . Two seconds later the bicyclist hops on his bike and accelerates at 2.2m/s2 until he catches his friend.

How much time does it take until he catches his friend (after his friend passes him)?

How far has he traveled in this time?

What is his speed when he catches up?

An electron is shot horizontally (x direction) with velocity of 2.2x10^5 m/s into a region with a uniform electric field of 10000.0N/C in the positive Y direction. What is its position(x and y) in 1.25 seconds?

Secret agent Samantha Bond, 55.00 kg, has just ignited her jet powered skis at the foot of a 10.0 degree slope that rises in height by 50.0 m. The skis have a thrust of 243.0 N. When she gets to the top of the slope, she keeps the skis at 10.0 degrees as she flies through the air. At what horizontal distance from the top of the slope, from where she took off, will she land? This will be 50.0 m below where she took off. The thrust of the skis is parallel to the skis. There is no friction on the slope, and air resistance can be ignored.

jogger travels a route that has two parts. The first is a displacement of 2.75 km due south, and the second involves a displacement that points due east. The resultant displacement has a magnitude of 4.25 km. (a) What is the magnitude of , and (b) what is the direction of    as a positive angle relative to due south? Suppose that - had a magnitude of 4.25 km. (c) What then would be the magnitude of , and (d) what is the direction of - relative to due south?

a.) number ___ units ___

b. number____ units _____

c. number____ units_____

d. number____ units_____

A small coin, initially at rest, begins falling. If the clock starts when the coin begins to fall, what is the magnitude of the coin's displacement between t1 = 0.188 s and t2 = 0.845 s?

You're a consultant on a movie set, and the producer wants a car to drop so that it crosses the camera's field of view in time t. The field of view has height h. Derive an expression for the height above the top of the field of view from which the car should be released.Express your answer in terms of the variables h, t, and appropriate constants.

on the wikipedia article about the equivalence principle there is a mention about testing the EP against parity-violating masses;

"The equivalence principle is untested against opposite geometric parity (chirality in all directions) mass distributions. A parity E

I'm interested in the meaning of the phrase "continuum limit" specifically as it is often used in expressions relating to the ability of a quantum gravity theory to recover GR in the continuum limit.

I believe I understand the meaning but want to make sure I am not missing some important part of the precise definition as my intuition may be off and I have not seen it defined anywhere.

Pointers to a place where it is defined in an online resource would be appreciated. A google search just turned up many references to it being used in papers and articles and such.

I recently heard about jet quenching concerning data taken by the experiments at the LHC. Apparently it is related to the existence to the quark-gluon plasma. As far as I understood this interpretation is an analogy to hydrodynamics (the jet is "blocked" by the plasma).

I would like to understand that in more details: why is this analogy a "good" one, how far can it go and how do we detect that experimentaly.

There are many stories about radioactivity and the relative danger of it in the news lately, but very little actual information. The radioactivity levels around Fukushima Daiichi are high, but seem negligible in just somewhat removed locations.

The real danger seems to stem from ingesting radioactive particles. Just how likely is it for that to happen in any considerable distance from the reactor, say in Tokyo, and how dangerous for the human body is it really? How far can these particles travel in any dangerous concentration?

Is it something unexpected?Why universality in cold atomic gases is important?What researches are looking for?Can this be useful for topological quantum computers?

Can we expect a whole myriad of these states?

http://arxiv.org/abs/1012.2698

thanks

There have been a lot of sci-fi shows recently using the "rotating space station" explanation for gravity on space stations.

After watching these videos:

http://www.youtube.com/watch?v=49JwbrXcPjc&NR=1
http://www.youtube.com/watch?v=_36MiCUS1ro

I was wondering what would happen, if you were facing the direction of rotation, while standing on the "floor" of a rotating space station and tossed a ball "up". From the video it looks like the ball should land in front of you. Is this in fact what would happen and if you dropped a ball would it land behind you?