Power Video Lessons

Concept

# Problem: The unit kilowatt-hour is a measure of(a) the rate at which energy is transformed. (b) power.(c) an amount of energy.(d) the amount of power used per second.

###### FREE Expert Solution

Power:

$\overline{){\mathbf{P}}{\mathbf{=}}\frac{\mathbf{W}}{\mathbf{t}}}$

Power is defined as the rate of work done.

Energy:

$\overline{){\mathbf{E}}{\mathbf{=}}{\mathbf{P}}{\mathbf{t}}}$

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###### Problem Details

The unit kilowatt-hour is a measure of

(a) the rate at which energy is transformed.

(b) power.

(c) an amount of energy.

(d) the amount of power used per second.