Question: Below is the formula for flow from a contraction. Q = C v A 1 2 g ( h 1 - h 2 ) (

Below is the formula for flow from a contraction.
Q=CvA12g(h1-h2)(A1A2)2-12
Comment on the use of contraction as a flow measuring device. Explain why contraction is used. Could an expansion be used in a similar way.

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