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A cylidrical wooden piece of cork floats...

A cylidrical wooden piece of cork floats in a liquid of density `sigma`. The cork is depressed slightly and released. Show that the cork will oscillate up and down simple harmonicaly with a period.
`T=2pisqrt((rhoh)/(sigmag))`, where `rho` is the density of the cork.

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SL ARORA-OSCILLATIONS-Example
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