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17 September, 00:26

Which phrases describe air pressure? Select three options.

decreases with denser air

decreases as altitude increases

equals mass divided by volume

results from a column of air pushing on an area

decreases due to fewer air particles pushing down

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  1. 17 September, 00:41
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    B) decreases as altitude increases

    D) results from a column of air pushing on an area

    E) decreases due to fewer air particles pushing down

    Explanation:

    Pressure is given by the formulae;

    P = F / A

    Whereby;

    P = pressure

    F = Force

    A = area

    Remember that ...

    F = Ma

    Whereby;

    F = Force

    M = mass

    a = acceleration

    Therefore pressure can be given as;

    P = Ma / A

    The mass of the above column of a substance multiplied by the acceleration due to gravity = pressure exerted by the substance
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