A student investigated how the type of insulation affects the rate of thermal energy transfer from a beaker of hot water.
Suggest one reason why the student repeated the temperature measurements for each type of insulation.
82 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations, covering 3.1.1 Gravitational potential energy, 3.1.2 Kinetic energy, and 3.1.3 Energy transfers and conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.