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

AI Thread Summary
The discussion focuses on calculating the kinetic energy in a cubic meter of seawater flowing at 2.5 m/s, with seawater density at approximately 1030 kg/m3. Participants seek the appropriate equations for kinetic energy and the mass of seawater in the specified volume. The conversation highlights the need for clarity on the formulas to determine kinetic energy and the flow's impact on energy extraction potential. There is an emphasis on understanding the theoretical limits of energy extraction from ocean currents. Overall, the thread underscores the importance of foundational physics concepts in analyzing oceanic kinetic energy.
annie05
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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
 
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