Question

At what speed will the velocity of the stream of heterosexual to 20cm of mercury coloum?

G = 10m/s
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Answer 1

Hey!
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◾Correct Question : At what speed will the velocity of water be equal to 20 cm of mercury column ? And it's g* = 10 m/s²

Solution → Here we have

➖•Velocity head : 20 cm of mercury column ( Hg) = 20 × 13.6 cm of water column ✔

➖•Also , g = 10 m/s² = 1000 cm/s²


[ We've just changed the system of units to Cgs ]

=> Now We know that ,

Velocity head = v²/2g ✔

=> 20 × 13.6 = v² / 2 × 1000

{ Cross Multiply & solve the values }

=> v = √20×13.6×2×1000

=> v = 737.5 cm/s

Again , changing to m/s We get


→v = 7.37 m/s approx

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Answer 2

The answer is 7.3 m/s