according to the law of conservation of energy, which statement must be true?\na. potential energy can only…
according to the law of conservation of energy, which statement must be true?\na. potential energy can only change to kinetic energy.\nb. a system cannot take in additional energy.\nc. the total energy of a system can decrease only if energy leaves the system.\nd. there is only one form of energy.
Answer
Brief Explanations:
The law of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed. Option A is wrong as potential energy can change into other forms like thermal energy too. Option B is incorrect since a system can take in energy. Option D is false as there are multiple forms of energy such as kinetic, potential, thermal etc. Option C is in line with the conservation - energy can only decrease in a system if it leaves the system.
Answer:
C. The total energy of a system can decrease only if energy leaves the system.