What kind of energy is represented by ke?

Explanation:

Depends on what you are measuring.

For example, in Chemistry, KE is measuring temperature. Temperature is the average of all the molecules present and their motion (using a gas as our base).

In physics, KE at beginning levels, is the speed of a moving object.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.