The equation for capillary rise:- h×ρ×g = (2×S×cosθ)/a ..............(1)
where h is height of the liquid rise in capillary tube, ρ is density of liquid, S is surface tension of the liquid,
a is radius of capillary tube and θ is the angle of contact.
If we multiply by πa2 on both side of eqn.(1), left hand side becomes mass m of liquid in the capillary tube.
Hence we rewrite eqn.(1), by multiplying both side wilth πa2 .
Modified equation is, m = 2×S×cosθ×π×a ....................(2)
ratio of mass mw of water to the mass ml of other liquid is given by
Hence the answer is :- 1) 5×10-3 kg