When air is inhaled, the mass of a person increases by the mass of air that has entered the lungs. Why, after taking a deep breath of air

When air is inhaled, the mass of a person increases by the mass of air that has entered the lungs. Why, after taking a deep breath of air, does a person swim on the surface of the water?

Because not only the mass of a person increases, but also the volume of air in the lungs.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.