A heat engine that pumps water out of an underground mine accepts 700 kJ of heat and produces 250 kJ of work. How much heat does it reject, in kJ

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false