Question

A glass full of milk is heavier compared to an empty glass. Why?​

Answer 1

Under normal conditions, the liquid water has lots more molecules per glass than the uncompressed glass of air. The mass of the atoms and molecules is perfectly normal and unchanged. It's just that there are lots more water molecules in the same volume because it's liquid.

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Answer 2

Answer :

Because milk kept in glass is a liquid and liquid occup space and has weight and because of that weight gas full of milk is became heavy.

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