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Mathematics 6 Online
OpenStudy (anonymous):

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)

OpenStudy (cwrw238):

1 watt = 1 joule per second so energy used = 350 * 30 joules

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