Question

why does the stone lose weight when it is immersed in water?

Answer 1

Archimedes principle says that when an object is immersed in a liquid the apparentloss of weight of an object is equal to the upthrust and this is also equal to theweight of the liquid displaced. ... You can see how the apparent weight of the stonegets less when it is immersed in water

Answer 2

When a body is partly or completely immersed in water (or any other liquid), then:Loss in weight of body = Weight of water (liquid) displaced by the body = Buoyant force or upthrust exerted by water (any liquid) on the body. It was Archimedes who first observed that bodies lose their weight when immersed in water.