A 120-v motor has mechanical power output of 260 hp it is, Ask an Expert

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A 120-V motor has mechanical power output of 2.60 hp. It is 85.0% efficient in converting power that it takes in by electrical transmission into mechanical power.

(a) Find the energy delivered to the motor by electrical transmission in 3.20 h of operation.

(b) If the electric company charges $0.110/kWh, what does it cost to run the motor for 3.20 h?

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