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 Online Tutoring : Forum : Homework Help - Physical Sciences : Physics
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Joined: 05 May 2007
Location: United States
Posts: 3
Posted: 05 May 2007 at 6:42am | IP Logged Quote Dianarows

A 110 V motor produces 2.50 hp of mechanical power. If this motor is 95.0% efficient in converting electrical power to mechanical power, find
(a) the current drawn by the motor (in A) and
(b) the total electrical energy (in both kWh and joules) used by this motor in running for one hour.

(c) If electrical energy costs $0.070/kWh, what does it cost to run the motor for this hour?
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