Question

22. In a U-tube experiment, a column AB of water is
balanced by a column CD of paraffin. The relative density
of paraffin is
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Answer 1

Answer:

Relative density of paraffin is given as

$\rho_r = \frac{h_1}{h_1}$

Explanation:

As we know that as per Pascal law of pressure balance we have to equate the pressure at same level due to both liquids

So we have pressure due to paraffin on left side of the tube is equal to the pressure due to water on right side of the tube

$P_o + \rho_p gh_1 = P_o + \rho_w g h_2$

now we have

$\frac{\rho_p}{\rho_w} = \frac{h_2}{h_1}$

so the relative density of paraffin is given as the ratio of height of liquids on two sides

so we have

$\rho_r = \frac{h_1}{h_1}$

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Topic : Relative density

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