Physics 7408/3BC June 2018

The AQA Paper 3 Physics exam (June 2018), Section B (Engineering Physics), covers topics related to angular momentum, flywheels, thermodynamics, and energy efficiency. It includes calculations involving the moment of inertia of a satellite, the change in angular speed as satellite arms are retracted, and the effect of frictional torque on a flywheel. The paper also explores the application of the first law of thermodynamics in engine cycles, including processes in a diesel engine. Additionally, questions discuss the efficiency of heat engines, comparing a paper mill′s energy needs with the potential use of a combined heat and power (CHP) system, and evaluate the maximum temperature in a thermodynamic cycle.