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Mechanical Properties Of Fluids

Question
CBSEENPH11019996
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Explain why:

(b) When we try to close a water tap with our fingers, fast jets of water gush through the openings between our fingers

Solution

According to equation of continuity, 
Area cross times space velocity space equals space constant

For a smaller opening, the velocity of flow of a fluid is greater than it is when the opening is bigger. When we try to close a tap of water with our fingers, fast jets of water gush through the openings between our fingers. This is because very small openings are left for the water to flow out of the pipe. Hence, area and velocity are inversely proportional to each other. Therefore velocity of water increases. 

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