Two hikers of equal weight are walking across a field of deep, soft snow. One hiker is wearing snowshoes, while the other is wearing regular hiking boots.
Explain why the hiker wearing snowshoes can walk across the snow without sinking, but the other hiker cannot.
A cyclist inflates their bicycle tyre in a heated room to a pressure of 28.0 N/cm228.0\text{ N/cm}^228.0 N/cm2. The bicycle is then taken outside into the cold air.
Suggest a value for the pressure of the air inside the tyre when it has cooled down.
pressure=…………………… N/cm2 \text{pressure} = \dots\dots\dots\dots\dots\dots\dots\dots\text{ N/cm}^2 pressure=…………………… N/cm2In terms of the air molecules inside the tyre, explain the change in pressure of the air.
188 exam-style questions on CIE IGCSE Physics Pressure, covering Pressure. Each one has a worked solution and a mark scheme showing where the marks go.