Calculate the total electrical energy consumed for a load usage of 6 fans (59 W each) for 9 hours a day.
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Calculate the total electrical energy consumed for a load usage of 6 fans (59 W each) for 9 hours a day.
Write the load of each fan,
Calculate the total load for 6 fans,
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- A power of 6 kW is supplied to the motor of a crane. The motor has an efficiency of 90%. With what constant speed does the crane lift an 800 lb weight. The correct answer is 1.5 m/s.Havard University campus has 200 classrooms and 400 faculty offices. The classrooms are equipped with 12 fluorescent tubes, each consuming 110 W, including the electricity used by the ballasts. The faculty offices, on average, have half as many tubes. The campus is open 240 days a year. The classrooms and faculty offices are not occupied an average of 4 h a day, but the lights are kept on. If the unit cost of electricity is $ 0.082/kWh, determine how much the campus will save a year if the lights in the classrooms and faculty offices are turned off during unoccupied periods.A material which conducts electricity only at high temperature is termed as _______________.
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