Physics 7408/3A June 2019

The AQA Paper 3 Physics exam (Section A, June 2019) focuses on a range of experimental and theoretical topics in physics. Key areas covered include the safety procedures for handling radioactive sources, the decay process of radium-226, and the inverse-square law for gamma radiation. The paper also examines procedures for measuring the range of particles such as alpha and beta radiation, as well as experiments involving water flow rates and their dependence on height. Additional topics include the determination of mass per unit length of a wire, the behavior of stationary waves, and the use of vernier callipers to measure the diameter of a cylindrical rod.