Hydraulics and Fluid Mechanics in ME
The conditions for the stable equilibrium of a floating body are

a righting couple should be formed
all the above are correct
the center of buoyancy and the center of gravity must lie on the same vertical line
the meta-center should lie above the center of gravity

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Hydraulics and Fluid Mechanics in ME
In open channels, the specific energy is the

Total energy per unit discharge
Total energy measured above the horizontal datum
Kinetic energy plotted above the free surface of water
Total energy measured with respect to the datum passing through the bottom of the channel

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