What is the gain in potential energy of the water column in case of rises of water in a glass capillary tube?
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The gain in potential energy in a capillary tube when water rises up will be ∆U = mgh
m = (density of liquid)×(area of capillary)×(height of liquid) = mass of liquid that rises
g = 9.8 or 10 m/s^2
h = height of liquid rised
In this case as something rises up the potential energy increases
In case of mercury, it depresses down so potential energy will be lost as h will be negative
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