Question: 4. A fan sends static air into a 45m long; rectangular pipe of 200mm300mm. The air entering the pipe is 15C and 750mmHg absolute pressure,

4. A fan sends static air into a 45m long; rectangular

4. A fan sends static air into a 45m long; rectangular pipe of 200mm300mm. The air entering the pipe is 15C and 750mmHg absolute pressure, and the flow rate is 0.6m3/s. What is the theoretical power required? For a smooth tube, f=16/Re in laminar flow; f= 0.046Re0.2 in turbulent flow; Re is the Reynolds number. (20\%)

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