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A tank of cross section A contains a liquid of density up to a height H. There is a of cross section a, at the bottom of tank. The time in which the liquid is required to half is

A tank of cross section A contains a liquid of density up to a height H. There is a of cross section a, at the bottom of tank. The time in which the liquid is required to half is
 

Grade:9

3 Answers

Arun
25750 Points
4 years ago
p { margin-bottom: 0.25cm; line-height: 120%; }

Let v be the velocity at the surface of liquid. Then from continuity principle, velocity at the orifice will be 3v.

From Bernouli's principle, we have,

where P = atmospheric pressure,  is the density of the liquid.

Solving above equation for v, we have

differentiating both sides with respect to time, we get

 

 

Acceleration is negative as velocity is decreasing, as H is decreasing.

Note, acceleration is constant, it does not depend on the value of H

Vikas TU
14149 Points
4 years ago
aswanth nayak
100 Points
4 years ago

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