Question 316: Properties of Matter

Question

A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in Water. The mass of water that will rise in this tube is :

Accepted Answer

The weight of water in the capillary is balanced by the surface tension force.
mg = 2$$\pi $$r.T.cos$$	heta $$
Since constant, m is directly proportional to r.
m $$ \propto $$ r
$${{{m_2}} \over {{m_1}}} = {{{r_2}} \over {{r_1}}}$$
$${{{m_2}} \over 5} = {{2r} \over r}$$
$$ 	herefore $$ $${m_2}$$
= 10 grams.

Answer

5.0 g

Answer

10.0 g

Answer

20.0 g

Answer

2.5 g

Properties of Matter

A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in Water. The mass of water that will rise in this tube is :

Choose the correct answer: