Taylor accidentally dropped a penny on the shallow end of the pool. They know that the depth of the pool is 1 m and it appears that the penny is about 75 cm from the surface of the water. Calculate the index of refraction of the water in the pool.

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.