question_answer

Fluid flow rate Q, can be measured easily with the help of a venturi tube, in which the difference of two pressures, \[\Delta \,P,\]  measured at an upstream point and at the smallest cross-section of the tube, is used. If a relation \[\Delta \,P\propto {{Q}^{n}}\] exists, then n is equal to:

A) \[\frac{1}{3}\]                          

B) \[\frac{1}{2}\]

C) 1                                 

D) 2