The energy needed to change a substance from one state to another is called of fusion/vaporization. a. heat b. work c. entropy d. energy

The question is very poorly constructed.

The energy needed to change a substance from the solid to the liquid state is called the "latent heat of fusion".

The energy needed to change a substance from the liquid to the gaseous state is called the "latent heat of vaporization".

The question is simply fishing for the word that's used in both of these labels, so the word is heat. (a)

battery with hi vtge high val resist in series

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank