A175 g ball on the end of a 0.5 m light string is revolving uniformly at 2 rev/s. what is the ball's acceleration and string's tension?

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

If steel is more dense that lake water, why can a boat float

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.