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When we blow air into a balloon, it swells up evenly on all sides. This shows that:
The atmospheric pressure at sea level is about:
A rubber suction hook, when pressed firmly against a smooth tile, sticks to it and can hold a towel. Explain why.
Air above us exerts a pressure of about 100 000 Pa. Why are we not crushed by this huge pressure?
When more air is pumped into a bicycle tyre, it becomes harder. Explain this using the idea of gas pressure.
A table top measures 1.2 m × 0.6 m. Taking atmospheric pressure as 1.0 \times 10^{5} Pa, find the force (in N) exerted by the air on the top surface of the table. (Think: why does the table not break?)
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