Question

An aluminium ball is fully immersed in distilled water, well water, sea water and inland lake water, one by one. The aluminium ball will appear to suffer the maximum loss in weight when immersed in :
(1) distilled water
(2) sea water
(3) well water
(4) lake water

Answer 1

When a body is immersed in a liquid it feels an upward force, which is known as buoyant force. The buoyant force depends upon the weight of the liquid displaced by the body.

In the given case, an aluminum ball is immersed in different liquids of the different densities. More the density of the liquid, more the weight of the liquid displaced by the ball. When the weight of the liquid displaced will be maximum, the ball will feel the maximum upward force, hence maximum loss in weight. Seawater is known to have the maximum density among all types of waters, so when the ball will be immersed in sea water, it will experience the maximum weight loss.

Hence, the correct answer is option 2.