SELECT * FROM question_mgmt as q WHERE id=4165 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=190 and ex_no='5' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Gravitation you find your mass to be 42 kg on a weighing machi

Question:

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

Answer:

The weighing machine reads slightly less than the actual value. This is because of the upthrust of air acting on our body. Hence, the body gets pushed slightly upwards, causing the weighing machine to show a reading less than the actual value.


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