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

5.73 cm

The rise or depression in capillary is given by


Let the angle for mercury be . We know that for water,


Given, depression in mercury


For mercury, —————(1)


Let the rise in water be x


—————(2)


Dividing (2) by (1)




We know ,






1