First slide

Fluid dynamics

Question

In a vessel of water a hole is made at a depth of 3 .5 m from the free surface. The velocity of efflux will be:

Easy

A

8.4 m / s
B

84 m / s
C

8.4 cm / s
D

84 cm / s

Solution

$u = \sqrt{2 gh} = \sqrt{2 \times 9.8 \times 3.5} = 8.3 m / s$

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