You find your mass to be 42 kg

Question.
You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg ?

Solution:
When you weigh your body, an upward buoyant force acts on your body due to the air (a fluid) present around you. As a result, the body gets pushed slightly upwards, causing the weighing machine to show a reading slightly less than the actual value.

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