What is free-fall acceleration on the surface of the moon?

Why there is no inductive reactance in dc circuits

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.