4. An electric motor is 70% efficient. It is used to raise a weight of 250 lb a vertical distance of 15 ft. in 10 seconds. 5. What is the work done by the motor in raising the weight? 6. What is the power developed by the motor? 7. Considering the efficiency, at what rate must power be supplied to the motor.
4. An electric motor is 70% efficient. It is used to raise a weight of 250 lb a vertical distance of 15 ft. in 10 seconds. 5. What is the work done by the motor in raising the weight? 6. What is the power developed by the motor? 7. Considering the efficiency, at what rate must power be supplied to the motor.
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter2: Matter And Energy
Section: Chapter Questions
Problem 19RQ: What are the two types of energy most frequently used or considered in this industry?
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