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

Options

A. 2.5 g
B. 5.0 g
C. 10 g
D. 20 g

Answer

c

Explanation

`h=(2Tcostheta)/(rrhog)`
Mass of water in first capillary ,
`m=pir^(2)hrho=pir^(2)xx((2Tcostheta)/(rrhog))xxdelta` `=(2pirTcostheta)/(g)`
`thereforemproprtherefore(m.)/(m)=(2r)/(r)=2`
or `m.=2m=2xx5g=10`