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A room has a volume of 225 m3. An air-conditioning system is to replace the air...

A room has a volume of 225 m3. An air-conditioning system is to replace the air in this room every 56.6 minutes, using ducts that have a square cross-section. Assuming that air can be treated as an incompressible fluid, find the length of a side of the square if the airspeed within the ducts is (a) 2.00 m/s and (b) 5.00 m/s.

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