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प्रश्न
Pressure at the free surface of a water lake is P1, while at a point at depth h below its free surface is P2. (a) How are P1 and P2 related? (b)Which is more P1 or P2?
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उत्तर
(a) P2 = P 1 + h ρ g ,
(b) P2 > P 1
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