FILE No.109Unsolved
A glass is filled to the brim with water, with ice floating in it. Part of the ice sticks out above the surface. When all the ice has melted, what happens to the water level?
If you get stuck, open the hints one at a time, in order.
How much of the ice is under the water?
A floating object pushes aside water equal to its own weight.
Where does the melted water go?
A glass is filled to the brim with water, with ice floating in it. Part of the ice sticks out above the surface. When all the ice has melted, what happens to the water level?
Choose the answer closest to the truth.
It stays the same
The answer is "It stays the same."
Floating ice pushes aside a weight of water equal to its own weight. When it melts, it becomes exactly that weight of water, which fills the space it had displaced.
The glass will not overflow, and the water level will not rise.
Because you assume ice takes up more volume than water and think the level rises.
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