Question

Capillary tube of inner diameter 0.5 millimetre is dipped in a liquid of a specific gravity 13.6 surface tension 5:45 dial angle of a contact is 130 degree find the depression or elevation of a liquid in the tube

Answer 1

Answer:

The depression of a liquid in the tube is 2.10 cm.

Explanation:

Given that,

Diameter = 0.5 mm

Specific gravity = 13.6

Surface tension = 545 dyne/cm

Angle = 130°

We need to calculate the depression of a liquid in the tube

Using formula of deviation of liquid in the tube

$h=\dfrac{2T\cos\theta}{r\rho g}$

Where, T = tension

r = radius

$\rho$ = density

g = acceleration due to gravity

Put the value into the formula

$h=\dfrac{2\times545\cos130}{0.25\times10^{-1}\times13.6\times9.8}$

$h=-2.10\ cm$

Negative sign shows the deviation of liquid in the capillary tube

Hence, The depression of a liquid in the tube is 2.10 cm.