3. A 200N little boy is standing on the shore and he pushes his raft away with a force of 25N. How much force does the raft exert on the little boy?

In what direction does the medium move relative to the direction of the wave? explain.

J. j. thomson’s experiment disproved the theory that an atom

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.