Question

Find minimum size of the glass
tubing that can be used to
measure water level if the
capillary rise in the tube is not
to exceed 0.25 mm. The
surface tension of water in
contact with air is 0.0735 N/m.
O 0.120 cm
O 0.120 mm
O 120 cm
O 120 mm​

Answer 1

Answer:

The answer is 120 mm.

Explanation:

hope it will help uuu

Answer 2

The size (diameter) of the glass tubing is 120 mm

Therefore, option (d) is correct.

Explanation:

Given:

Rise in the capillary = 0.25 mm

Surface tension of water in contact with air = 0.0735 N/m

To find out:

The size of the glass tube i.e. its diameter

Solution:

We know that if the rise of liquid in a capillary tube is h, the density of the liquid ρ, surface tension T and the radius of the capillary tube is r then

$h=\frac{2T}{r\rho g}$

$\implies r=\frac{2T}{h\rho g}$

Given that

$h=0.25$ mm = $0.25\times 10^{-3}$ m

$T=0.0735$ N/m

$\rho=1000$ kg/m³

Thus,

$r=\frac{2\times 0.0735}{0.25\times 10^{-3}\times 10^3\times 9.8}$

$\implies r=0.06$ m

$\implies r=60$ mm

Thus, the diameter of the tube

$d=2r=120$ mm

Hope this answer is helpful.

Know More:

Q: The capillary rise at 20 c in clean glass tube of 1 mm diameter containing water is approx.?

Click Here: https://brainly.in/question/9318509