A cylinder contains pressurized gas. A valve is opened slightly, allowing some of the gas to escape.
Which of the following correctly describes what happens to the mass and to the weight of the gas remaining inside the cylinder?
Mass decreases; weight decreases
Mass decreases; weight stays the same
Mass stays the same; weight decreases
Mass stays the same; weight stays the same
209 exam-style questions on CIE IGCSE Physics Mass and weight, covering Mass and weight. Each one has a worked solution and a mark scheme showing where the marks go.