If a space vehicle circled earth at a distance equal to the earth–moon distance, how long would it take for it to make a complete orbit? in other words, what would be its period?
express your answer as an integer.

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.