Question

A beaker containing water is placed on the pan of a spring balance which shows a reading of `W_0`. A lump of sugar of mass `m` and volume `v` is now suspended by a thread (from an independent support). How will the reading change as time passes on ?

Answer 1

`W_(0) " " underset("(Initially)")(W_(0) +F_(B) = W_(0)+(rho omega)/(sigma)mg)`
As sugar dissolves completely, reading of balance `= W_0 + mg` The reading of balance will gradually increase till all the sugar dissolves in water and final reading `= W_0 + mg`.