SELECT * FROM question_mgmt as q WHERE id=3927 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=180 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)
The mass per unit volume of a substance is called density. (density = mass/volume). Arrange the following in order of increasing density – air, exhaust from chimneys, honey, water, chalk, cotton and iron.
density = mass / volumes
Arranging substance in their increasing order of densities
Air < exhaust from chimneys < cotton < water < honey < chalk < iron.
Reason: (The most heavy will be the highest density.) Iron is heavy so there is more density and the air is light so its density is low.
Density is a property of matter which tells about how tightly particles are packed in a given object.
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