यदि एक तीक्ष्ण-धार वाले ऑरिफिस (sharp-edged orifice) के लिए संकुचन गुणांक (Cc) 0.65 है और प्रवाह का वेग गुणांक (Cv) 0.92 है, तो विसर्जन गुणांक (Cd) कितना होगा?

Two reservoirs at different levels are connected by two parallel pipes of lengths L and diameters 2d and d respectively. Assuming the friction factor is the same for both pipes, the ratio of the discharge in the two pipes (larger : smaller) is:

For a two-dimensional flow, the stream function is given by ψ = 3x2 - y3. The magnitude of velocity at the point (2, 1) is: