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What is the absolute pressure on a swimm...

What is the absolute pressure on a swimmer `10 m` below the surface of a lake? Take atmospheric pressure `1xx10^(5)N//m^(2)`

Text Solution

Verified by Experts

Pressure at any depth `h` from the free surface of the water is given by `P=rhogh+P_(a)`
`=(1000)xx10xx10+1.0xx10^(5)=2.00N//m^(2)`
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Where is the pressure greater , 10 m below the surface of the sea or 20 m below the surface of sea ?

What is the pressure at the bottom of the ocean at a place where it is 3 km deep ? [atmospheric pressure =1.01 xx10^(5)Pa, Density of sea water =1030kg m ^(-30)]

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Knowledge Check

  • What is the pressure at the bottom of the ocean at a place where it is 3 km deep ? [atmospheric pressure =1.01 xx10^(5)Pa, Density of sea water =1030kg m ^(-30)]

    A
    `1.01xx10^(5)Pa`
    B
    `3xx10^(5)Pa`
    C
    `1.01xx10^(7)Pa`
    D
    `3xx10^(7)Pa`

  • The kinetic energy per cubic metre of a perfect gas at N.T.P. is (Take atmospheric pressure =1xx10^(5)N//m^(2) )

    A
    `1.5xx10^(5)J//m^(3)`
    B
    `2xx10^(5)J//m^(3)`
    C
    `0.75xx10^(5)J//m^(3)`
    D
    `2.5xx10^(5)J//m^(3)`

  • What is the density of a gas at N.T.P. if the rms velocity of the gas molecules is 400m//s ? (Take atmospheric pressure P = 1xx10^(5)N//m^(2) )

    A
    `5/8kg//m^(3)`
    B
    `11/8kg//m^(3)`
    C
    `15/8kg//m^(3)`
    D
    `25/8kg//m^(2)`