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OpenStudy (hope210):
will medal A garage door opener has a power rating of 350 watts. If the door is in operation for 30 seconds, how many joules of energy are used? (Hint: Remember that 1 watt = 1 joule/sec) a.350 J b.11.7 J C.10,500 J D.0.086 J
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OpenStudy (hope210):
@logan13
OpenStudy (anonymous):
Power = Rate of work done P = W/t Where W = work done, t= time 350/30 = Work done
OpenStudy (radar):
Joules and "watt seconds" are equivalent. Simply multiply the power times the time.
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