Question

A block of iron is kept at the bottom of a bucket full of water at `2^@C`. The water exerts bouyant force on the block. If the temperature of water is increased by `1^@C` the temperature of iron block also increases by `1^@C`. The bouyant force on the block by water
A. will increases
B. will decreases
C. will not change
D. may decreases or increases depending on the values of their coefficient of expansion

Answer 1

Correct Answer - A
Increasing the temperature of water from `2^(@) C` to `3^(@)C` increases its density while decreases the density of iron. Hence the bouyant force increases.