A meteorological balloon is filled with helium gas and released to measure atmospheric conditions at high altitudes.
Explain, in terms of momentum, how the helium atoms produce a force on the inner walls of the balloon.
At the launch site, the pressure of the helium in the balloon is 1.2 × 105 Pa and the volume of the balloon is 4.5 m3.
As the balloon rises, the external pressure decreases and the volume of the balloon increases, while the temperature of the helium remains constant.
Explain, in terms of the helium atoms, why the pressure inside the balloon decreases as its volume increases.
At the launch site, the pressure of the helium in the balloon is 1.2 × 105 Pa and the volume of the balloon is 4.5 m3.
As the balloon rises, the external pressure decreases and the volume of the balloon increases, while the temperature of the helium remains constant.
Calculate the pressure of the helium when the volume of the balloon reaches 6.0 m3.
126 exam-style questions on CIE IGCSE Physics 2.1.3a The absolute scale of temperature. Each one has a worked solution and a mark scheme showing where the marks go.