For an electric toothbrush, is input energy equal to useful output energy? Explain
your answer.

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Particles vibrate in a rigid structure and do not move relative to their neighbors.