What happens to a sheet of copper as the average kinetic energy of the copper molecules decreases?

An 8000-kg engine pulls a 40,000 kg train along a level track and gives it an acceleration a1 = 1.20 m/s 2. What acceleration (a2) would the engine give to a 16,000-kg train?

What is the charge of a proton?

The steel beams in one part of a building will be 65 feet long. On the blueprint, the architect draws the beams 13 inches long. For another part of the building, the architect draws 8-inch beams.

Assuming no air resistance, how far will a 0.0010 kg raindrop have fallen when it hits the ground 30.0 s later. Assume g = 9.8 m/s2. a) 294 m b) 4410 m c) 8820 m d) 44,000 km

A airplane travels 3260 kilometers in 4 hours. What is the airplane average speed?

A person of 83 kg is in an elevator. If the elevator is moving at a speed of 5 m/s, what's the person's kinetic energy? Keep 4 significant figures a 1,004 J b 1,038 c 1,280 J d 980 J e 1,435 J

What two equations can be used to determine the speed of a wave

Which force has an infinite range and is always attractive?

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters how long is the ramp

Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?