The second law of thermodynamics imposes what limit on the efficiency of a heat engine? the second law of thermodynamics imposes what limit on the efficiency of a heat engine? a heat engine must deposit some energy in a cold reservoir. the energy a heat engine must deposit in a cold reservoir is greater than or equal to the energy it extracts from a hot reservoir. the energy a heat engine must deposit in a cold reservoir is greater than or equal to the energy extracted as useful work.

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.