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Some pressure concepts i don't understand

  1. Sep 17, 2009 #1
    1. The problem statement, all variables and given/known data

    The pressure at 10 m below the surface of the ocean is about 2.00×10^5 Pa.

    Which of the following statements is true?

    a. The weight of a column of seawater 1 m^2 in cross section and 10 m high is about 2.00×10^5 N.
    b. The weight of a column of seawater 1 m^2 in cross section and 10 m high plus the weight of a column of air with the same cross section extending up to the top of the atmosphere is about 2.00×10^5 N.
    c. The weight of 1 m^3 of seawater at 10 m below the surface of the ocean is about 2.00×10^5 N.
    d. The density of seawater is about 2.00×10^5 times the density of air at sea level.

    I may sound a bit greedy but if you can please explain why it is that and why others aren't right
     
  2. jcsd
  3. Sep 18, 2009 #2

    tiny-tim

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    Welcome to PF!

    Hi benedict9999! Welcome to PF! :smile:
    No, you first! :wink:

    Tell us which one you think it is, and why. :smile:

    ( Start with the definition of pressure )
     
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