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.
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.