Question 2
You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

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Solution

We know that,
Measured weight = Actual weight — Buoyant force
=> Actual weight = Measured Weight + Buoyant force
For the same mass of 100 kg, the volume of cotton is greater than the volume of iron. This means the buoyant force on cotton is greater and hence it is heavier than the iron bar.

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Question 2 You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

We know that, Measured weight = Actual weight — Buoyant force => Actual weight = Measured Weight + Buoyant force For the same mass of 100 kg, the volume of cotton is greater than the volume of iron. This means the buoyant force on cotton is greater and hence it is heavier than the iron bar.

Question 2
You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

We know that,
Measured weight = Actual weight — Buoyant force
=> Actual weight = Measured Weight + Buoyant force
For the same mass of 100 kg, the volume of cotton is greater than the volume of iron. This means the buoyant force on cotton is greater and hence it is heavier than the iron bar.