3. The oldest working steam engine was designed in 1779 by James Watt. Suppose the engine's efficiency is 8.0 percent. How much work must be done by the engine if 2.5 kJ is transferred by heat into the engine ? Please help

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

Energy is the ability to do work which measures what