Qstnid -I-9-consider The Barometer Shown In Figure. If A Small Hole Is Made At A Point P In The Barometer Tube, Will The Mercury Come Out From This Hole? <Span Style="color: #Ff0000;">figure</span> - 13: Fluid Mechanics - Neet-xii-physics

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NEET-XII-Physics

13: Fluid Mechanics

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#9
Consider the barometer shown in figure. If a small hole is made at a point P in the barometer tube, will the mercury come out from this hole?
figure
Ans : Two pressures are acting upon point P:
(1) Pressure due to mercury level above point P equals to P₁ (say)
(2) Atmospheric pressure = P₀ (inwards)
And,
P₀> P₁
As the inward pressure is more, the mercury will not come out of the hole.
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