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Hydrometer and Lactometer

A mercury wat...

Question

A mercury water manometer has a gauge difference of 0.8 m. The difference in pressure measured in metres of water is

A

0.8

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B

1.06

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C

10.05

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D

8.02

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Solution

The correct option is C 10.05
$x = h (\frac{ρ_{m}}{ρ_{w}} - 1) = 0.8 (\frac{13.6}{1} - 1) = 10.08 m$

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