Question

(You have a bag of cotton and an iron bar, each indicating a mass of 100kg when measured on a weighing machine. In reality, one is heavier than the other. Can you say which one is heavier and why?)
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Answer 1

Answer:

iron bag have higher weight because there is more density of iron in comparison to cotton and please follow me

Answer 2

$\huge\mathfrak{\purple{answer}}$

The bag of cotton is heavier than the bar of iron. The cotton bag has a larger air thrust than the iron bar. The weighing machine therefore indicates a smaller cotton bag weight than its actual weight.