Một hòn đá rơi từ một cái giếng cạn đến đáy mất 3 giây. Cho g = 9,8 m/s². Tính độ sâu của giếng.

Which type of basaltic lava flow has a fairly smooth

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

A58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move toward third base with a velocity of 38.0 m/s.