# A 120. - V motor has mechanical power output of 2.50 hp. It is90.0% efficient in converting power that it takes in by electricaltransmission into mechanical power. (a) Find the current in themotor. (b) Find the energy delivered to the motor by electricaltransmission in 3.00 h of operation. (c) If the electric companycharges \$0.110/kWh, what does it cost to run the motor for3.00 h?

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A 120. - V motor has mechanical power output of 2.50 hp. It is
90.0% efficient in converting power that it takes in by electrical
transmission into mechanical power. (a) Find the current in the
motor. (b) Find the energy delivered to the motor by electrical
transmission in 3.00 h of operation. (c) If the electric company
charges \$0.110/kWh, what does it cost to run the motor for
3.00 h?

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