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Name: Ernest
Status: N/A
Age: 20s 
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Question:
Consider a metal can which is open on one end and which has a small hole in the bottom. This can is released in a glass container slightly wider than the can and into which enough water has been added so that it will cover the can after it sinks. As the can fills with water and eventually sinks to the bottom, the height of the water in the glass changes. Exactly how can this be explained.



Replies:
The metal can has some volume to it. When the water has entered the can and displaced all the air that was in it, the water level will be raised a little bit, because now the volume under the surface of the water is equal to the volume of the water plus the volume of the metal can.

Richard Barrans Jr., Ph.D.



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