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Pressure & Hydrostatic Pressure

  1. Mar 21, 2016 #1
    Hello, I would like somebody to help me with few simple questions for my homework. I did try to solve them but I failed at few of them. Here are the two papers I need to help with. I need help with the highlighted excerises. I tried some basic formulas for pressure and hyrdostatic pressure but as I said I failed a lot. May you guys please explain how can I achieve the result on these exercises. On the page with exercises 11) 12) and 13) Could you please explain i depth the 12 and 13? If you cant read the exercise just skip it. I would like to thank you in advance.

    1. The problem statement, all variables and given/known data
    12422294_1116618255036929_1761668000_o.jpg

    12887368_1116619031703518_2106543134_o.jpg
    2. Relevant equations

    Well I tried to work with
    P = H ⋅ ρ ⋅ g
    also I tried for the stone 13)
    V = (m ⋅ S) : ρ (of the stone)

    3. The attempt at a solution

    I would like to apologise for not posting my attempts as it is just mess on my paper. I tried using these formulas but did not help. I was only given these. Cant really figure out much.


     

    Attached Files:

    Last edited: Mar 21, 2016
  2. jcsd
  3. Mar 21, 2016 #2

    haruspex

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    Please post an attempt by typing it in. Use LaTeX if you can, or just use the superscript, subscript and special character (Σ) buttons above.
     
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