A kilogram of cotton will weigh ___________in air than in vacuum.

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Solution

Weight of 1 kg of cotton will be less in the air because of buoyant force.
As buoyant force acts against gravitational force, the weight of cotton will decrease.
Thus weight of cotton will be more in a vacuum since no buoyant force acts on it.
Hence, a kilogram of cotton will weigh less in air than in vacuum.

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