Question: Air is passing through a round duct with an inside diameter of 2 ft in an air conditioning system. The air is at a temperature

Air is passing through a round duct with an inside diameter of 2 ft in an air conditioning system. The air is at a temperature of 60°F and a pressure of 1 atm.
The air is flowing at a rate of 5000 cfm. As the air passes through the duct system, it flows through three 90° mitered elbows with 3 miter joints. Determine the pressure loss due to the three mitered elbows. Express your answer in inches of water (in H2O).

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