You serve a volleyball with a mass of 2.1kg. The ball leaves your hand at 30m/s. What is the ball’s kinetic energy? *

Asteady current of 1 ais flowing through a conducter calculate the number of electrons that flows through conductor in 1second

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

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.