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Homework Help: Kinetic Energy in water and the rate carried across each square meter

  1. Mar 11, 2013 #1
    1. Consider an ocean current flowing at 2.5m/s
    a) How much kinetic energy is contained in a cubic volume of water that measures 1m on each side? The density of seawater is about 1030kg/m3
    b) If the flow is perpendicular to one of the cube faces, what is the rate at which the current carries kinetic energy across each square metre? Your answer gives an upper limit for the power that could be extracted from the flow, although it is an unrealistic limit because you’d have to stop the entire flow

    2. I am not sure of which equations to use

    3. No attempted solution
  2. jcsd
  3. Mar 11, 2013 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    What's the formula for kinetic energy?

    What's the mass of 1 m^3 of seawater?
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