1.

What is the pressure on a swimmer 10m below the surface of a lake?

Answer»

Solution :Here
h=10M and `p=1000 kg m^-3` take `g=10 ms^-2`
`P=P_a+pgh`
`=1.01 times 10^5 Pa+1000 kg m^-3 times 10 ms^-2 times 10m`
`approx 2 atm`
This is a 100% increase in pressure from SURFACE LEVEL. At a depth of 1km, the increase in pressure is 100 atm Submarines are designed to withstand such ENORMOUS pressures.


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