Asealed tank containing seawater to a height of 12.8 m also contains air above the water at a gauge pressure of 2.90 atm . water flows out from the bottom through a small hole.

The velocity of water at the bottom,

Given:

Height of water in the tank, h = 12.8 m

Gauge pressure of water,

Solution:

Now,

Atmospheric pressue,

At the top, the absolute pressure,

Now, the pressure at the bottom will be equal to the atmopheric pressure,

The velocity at the top, , l;et the bottom velocity, be .

Now, by Bernoulli's eqn:

where

Density of sea water,