A fan with a diameter of 12 inches operates at a voltage of


A fan with a diameter of 12 inches operates at a voltage of 120V with a current draw of 0.5 amps. The manufacturer claims the average velocity of air leaving the fan is 33.1 ft./s under standard conditions. Standard air has a density of 0.075 lb mass per feet cubed. Is the manufacturer's claim valid? What is the efficiency of this fan/motor system?

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Mechanical Engineering: A fan with a diameter of 12 inches operates at a voltage of
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