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20 January, 11:41

The barometer shown in fig. p1.35 contains mercury (5 13.59 g/cm3). if the local atmospheric pressure is 100 kpa and g 5 9.81 m/s2, determine the height of the mercury column, l, in mmhg and inhg.

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  1. 20 January, 11:54
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    Given:

    Density of mercury (ρ) = 513.59 g/cm3 = 513.59*10^3 kg/m3

    Patm = 100 kPa

    g = 59.81 m/s2

    To determine:

    The height (h) of the column

    Calculation:

    Patm = ρgh = 513590*59.81*h

    100,000 = 3.0718*10^7*h

    h = 0.00325 m

    1 inch = 0.0254 m

    h = 0.128 inches

    Ans: height (h) = 0.00325 m or 0.128 inches
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