Physics 7408/3BC June 2019

The AQA Paper 3 Physics exam (June 2019), Section B (Engineering Physics), covers topics including the mechanics of a fly-press used by a jeweller, torque diagrams for diesel engines and electric motors, heat engine cycles, and the use of heat pump tumble-dryers. Key areas include calculating moment of inertia, angular deceleration, and energy storage, as well as comparing the effects of increasing the distance and radius of rotating components on stored energy. The exam also includes discussions about engine efficiency, the application of the second law of thermodynamics, and analyzing the advantages of heat pumps in reducing electrical energy use for household appliances.