The lower end of a capillary of tube is immersed in Hg. The level of Hg in the tube is found to be 2 cm below the outer level. If the same tube is immersed in water, upto what height will the water rise in capillary ?

HCV , vol I , page 301 Q.20

 IT is quite simple

for mercury.. h**g=2T*cos140/R

=>R=2T*cos140^o/h*rho*g

=2*465*(-.766)/(-2)*13.6*980=0.0267cm

FOR WATER..

h**g=2T*cos0^o/R

=>h=2T/(R**g)

=>h=2*75/.0267*1*980=5.732cm