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29 November, 14:36

If the water in a lake is everywhere at rest, what is the pressure as a function of distance from the surface? The air above the surface of the water is at standard sea-level atmospheric conditions. How far down must one go before the pressure is 1 atm greater than the pressure at the surface?

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  1. 29 November, 16:07
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    101325 + 10055.25h

    //

    h = 10.1 m

    Explanation:

    the pressure at sea level = 1 atm = 101325 Pa

    density of sea water = 1025 kg / m^ (3)

    pressure due to fluid height = pgh

    Absolute pressure = 101325 + 1025*9.81*h

    = 101325 + 10055.25h

    where h = 0 at sea level at increases downwards

    //

    101325 = 1025 * 9.81 * h

    h = 10.1 m
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