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1. Air is flowing through an 8-in.-diameter duct at an average velocity of 4100 ft/min. What is the flow Reynolds number?

2. What is the coefficient of entry for a hood that has a velocity pressure of 1.1 "wg and a hood static pressure (absolute value) of 1.8 "wg?

3. Calculate the velocity pressure for a hood with a coefficient of entry of 0.75 and a hood static pressure (absolute value) of 0.95 "wg.