Question
Question: A block of iron is kept at the bottom of a bucket full of water at 2<sup>0</sup>C. The water exerts ...
A block of iron is kept at the bottom of a bucket full of water at 20C. The water exerts buoyant force on the block. If the temperature of water is increased by 10C the temperature of iron block also increased by 10C. The buoyant force on the block by water.
A
(a) Will increase
A
(b) Will decrease
A
(c) Will not change
A
(d) May decrease or increase depending on the values of their coefficient of expansion
Explanation
Solution
(a)
Increasing the temperature of water from 20C to 30C increases
it's density while decreases the density of iron.
Hence the buoyant force increases.