When a person inhales deeply, they take in air into their lungs. Air has mass. By drawing air into his body, the total mass supported by the balance increases. Since the balance measures the total force exerted on it (proportional to mass), the reading will increase.
A man is standing on a sensitive balance. If he inhales deeply, the reading of the balance
Asked in UPPSC Upper Mains 2013 · Topic: Mechanics (Newton's Laws of Motion and their applications)
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