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An orifice and a mercury manometer are used to accurately determine the flow of water through...

An orifice and a mercury manometer are used to accurately determine the flow of water through a 200mm diameter pipe. The volumetric flow rate through the pipe is 0.9m^3/s. Determine the diameter of the orifice that will cause a reading of 150mm between the mercury levels. Take Cd = 0.67

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