A car engine burns gas at 495 K, and exhausts to the air at 293 K. If
it ran at the highest possible
efficiency and used 10,000 J of
input heat, how much heat would
be rejected into the air?
(Unit = J)

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?

Aspacecraft that renters the earth’s atmosphere drastically slows down. the amount of kinetic energy the spacecraft has as it reenters the earths atmosphere