SOLUTION: How would I calculate amount of energy a 4 watt night light bulb uses ?

Question 1184013: How would I calculate amount of energy a 4 watt night light bulb uses ?
Answer by ikleyn(52778) (Show Source): You can put this solution on YOUR website!
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4 watts is the POWER of the bulb, which is the amount of energy per unit of time, in this case joules per second.


To calculate amount of energy consumed (or radiated) by the bulb, you should multiply the power in watts by the time in seconds.


Notice that 1 watt multiplied by 1 second is 1 joule.

About these units of energy and power, read Wikipedia articles

https://en.wikipedia.org/wiki/Watt

https://en.wikipedia.org/wiki/Joule

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