Two cannons sit on top of a 100 m high cliff. they fire identical cannon balls at the exact same moment. cannon ball a is fired at 20 m/s. cannon ball b is fired at 15 m/s. what will cannon ball b's vertical velocity (vx) be after 3 seconds?

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.