what would be the effect of replacing the steelball with a wooden ball, a lead ball and a ping pong ball of the same size neglecting air resistant​

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?