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Water and mercury are filled in two cylindrical vessels up to same height. Both vessels have a hole in the wall near the bottom. If `upsilon_(1) and upsilon_(2)` are the velocity of water and mercury coming out of the holes, find the relaton between `upsilon_(1) and upsilon_(2)`.

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Since velocity of efflux, `upsilon = sqrt(2 gh)`
Is independent of density of the liquid, hence, `upsilon_(1) = upsilon_(2)`.
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