1.

What weighs more 1 kg of cotton or 1 kg of iron?

Answer»

Answer:

As surface area of 1 kg cotton is more, the UPTHRUST will be more on cotton than on iron. Hence the weight SHOWN on the WEIGHING machine of cotton is less than it's real weight. Therefore 1 kg of cotton will weigh more than 1 kg of iron when weighed on a weighing machine.

Explanation:

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