The dimensions of a hall are 10 m x 7 m x 5 m. If the density of air is 1.11 kg m-3, find the mass of air in the hall.
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A balloon filled with hydrogen rises in air. Explain the reason.
The density of air is 1.28 g litre-1. Express it in:
(a) g cm-3
(b) kg m-3
The density of aluminium is 2.7 g cm-3. Express it in kg m-3.
The density of alcohol is 600 kg m-3. Express it in g cm-3.