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Q.

A hole is made at the bottom of a tank filled with water. If the total pressure at the bottom of tank is 3 atmosphere and density of water is 1000 kgm−3, then the velocity of efflux is

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a

20 ms−1

b

102  ms−1

c

106  ms−1

d

105  ms−1

answer is A.

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Detailed Solution

Loss in pressure energy = Gain in kinetic energy ΔP=12ρv2⇒ v=2ΔPρ⇒ v={2×(3−1)atoms103}⇒ v={2×2×105103}=20 ms−1
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