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  4. The pressure on a swimmer 20 m below the surface of water at sea level is

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Q. The pressure on a swimmer $ 20 \,m $ below the surface of water at sea level is

AMUAMU 2010Mechanical Properties of Fluids

Solution:

Pressure at depth $h$
$=p_{a}+\rho gh$
where $p_{a}$ is atmospheric pressure
$=1.01 \times 10^{5} N/m^{2}$
$\therefore $ $p_{total}=1.01\times10^{5}+10^{3}\times10\times20$
$=3.01\times10^{5}\,pa$
$=3 \, atm$