What is the relationship between energy and power, and how does it impact the efficiency of a system?

Energy is the ability to do work, while power is the rate at which work is done or energy is transferred. In a system, the relationship between energy and power affects efficiency. Higher power means more energy is used in a shorter time, which can decrease efficiency if not managed properly. Conversely, lower power can lead to slower energy transfer, potentially impacting the system's overall efficiency.