1) explain why it is easier to lift a stone under water than in air. 2) a balloon filled with hydrogen rises in air explain the reason.
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Because of the bouynce of water which exerts opposite force due to gravitational acceleration. Also due to greater density of water.
Ballon rises in air because density of hydrogen is less than air so quite simple
Because of the bouynce of water which exerts opposite force due to gravitational acceleration. Also due to greater density of water.
Ballon rises in air because density of hydrogen is less than air so quite simple
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