The melting of icebergs

Fred	Lilly

„ Hello, Lilly! Have you already found the answer to the brain-teaser? “

„ No, not yet, but we could think about what would happen, if we threw an ice chunk into a pot with water and then let it melt. “

„ At first the ice chunk swims in the water and part of it rises above the water surface. Right?
But why actually? “

„ Let's think about that. The ice chunk has got a weight force which is directed towards the earth, that means downwards. Thus the ice chunk would actually have to sink. What is it that is pushing him upwards? “