Question

Consider a nuclear power plant, its transmission lines, and everything it provides energy to as a closed system. Which of the following is then true for the system?

thermal energy within system stays constant
mechanical energy within system stays constant
nuclear energy within system stays constant
total energy within system stays constant

Answer 1

I think the correct answer would be total energy within system stays constant. A closed system is a system where there in no mass and energy in and mass and energy out from the system. All of the mass and energy would be constant inside it. Hope this helps.