How does mass differ from weight

Why is there always some waste heat in a heat engine?

Is there anything about the behavior of electrons in atoms that is unexpected

A piece of paper is 30 cm tall and 20 cm long. What is its area in m2?

How long does it take the statue to reach the ground?

A cart moving at 10 m/s is brought to a stop by the force plotted in the force-time graph shown here. Find the impulse and the approximate mass of the cart. Show all your work.

Light acts like a. a wave. b. a particle. c. neither a wave nor a particle. d. both a wave and a particle.

A uniform rope of length L and negligible stiffness hangs from a solid fixture in the ceiling. The free lower end of the rope is struck sharply at time t=0.

A 62 pound box is on an incline. Determine the minimum force P that would result in the box starting to slide up the incline. (include units with answer)

During a collision with another car, the occupants of a minivan initially travelling at 4.0 m/s come to a complete stop in 0.5 s. What was the acceleration of the occupants of the minivan? a) 8.0 m/s2 b) - 8.0 m/s2 c) 2.0 m/s2 d) - 2.0 m/s2

A system dissipates 12 J of heat into the surroundings; meanwhile, 28 J of work is done on the system.