Energy level is Energy level.
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The energy level of the students in the classroom was high as they eagerly participated in the group discussion.
Solar panels convert radiant energy from the sun into electricity.
Kinetic energy is the energy possessed by an object in motion. For example, a moving car has kinetic energy that enables it to travel from one place to another. By harnessing kinetic energy, we can generate power through methods like wind turbines or hydroelectric dams.
I would use the term "instruments use sound energy" because instruments themselves are not capable of having or emitting energy, but rather they convert other forms of energy (such as mechanical energy or electrical energy) into sound energy when played.
A speeding bullet has a ton of kinetic energy.
Energy transformation occurs when a light bulb converts electrical energy into light and heat.