Question

you have a bag of cotton and iron bar which indicates a mass of 100 kg when measured on a waiting machine it relative Leone heavier than other can you say which one is heavier and why

Answer 1

iron have more mass because it is solid metal

Answer 2

Answer:

The density of cotton bag is less than that of the iron bar, so the volume of cotton bag is more compared to iron bar. So the cotton bag experience more up thrust due to the presence of air. Therefore in the presence of air the true weight of cotton bag is more compared to the true weight of iron bar.