BCECE Engineering BCECE Engineering Solved Paper-2009

  • question_answer
    The density of water at the surface of ocean is \[\rho \] If the bulk modulus of water is B, what is the density of ocean water at a depth where the pressure is\[n{{p}_{0,}}\] where\[{{p}_{0,}}\] is the atmospheric pressure?

    A) \[\frac{\rho B}{B-(n-1){{P}_{0}}}\]           

    B)        \[\frac{\rho B}{B+(n-1)P0}\]      

    C) \[\frac{\rho B}{B-n{{P}_{0}}}\]  

    D)        \[\frac{\rho B}{B+n{{P}_{0}}}\]

    Correct Answer: A

    Solution :

    When pressure is increased then density will decrease. Thus, the density of ocean water at a depth \[\rho =\frac{\rho }{1-\frac{dp}{B}}\]                 Here,     \[dp=n{{p}_{0}}-{{p}_{0}}\]                                 \[={{p}_{0}}(n-1)\]                 \[\therefore \]  \[\rho =\frac{\rho B}{B-(n-1){{p}_{0}}}\]


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