(a). A cube of side 5 cm is immersed in water and then in saturated salt solution. In which case will it experience a greater buoyant force. If each side of the cube is reduced to 4 cm and then immersed in water, what will be the effect on the buoyant force experienced by the cube as compared to the first case for water. Given reason for each case.
(b). A ball weghing 4 kg of density 4000 `kg//m^(3)` is completely immersed in water of density `10^(3)kg//m^(3)` find the force of buoyancy on it. (given `g=10m//s^(2))`

Explanation

To solve the given problem step by step, we will break it down into parts (a) and (b) as per the question.

### Part (a)

1. **Understanding Buoyant Force**:
The buoyant force (F_b) experienced by an object submerged in a fluid is given by the formula:
\[
F_b = V \times \rho \times g
...