Physics for IGCSE & O level - Measurements And Units (Section 5 - No. 32)
In the example of the balloon, how does heating the air affect it?
It expands and the density increases.
It expands and the density decreases.
It contracts and the density increases.
It contracts and the density decreases.
Explanation
Heating the air causes it to expand, and the density falls to 1.1 kg/m³
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