A semiconductor is a . a) crystalline solid that conducts current under any condition b) crystalline solid that conducts current under certain conditions c) metallic solid that conducts current under any condition d) metallic solid that conducts current under certain conditions

Explanation:

A crystalline solid that conducts current under certain conditions

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

answer(20) psi;