An engineer is investigating how the chemical formulation of a new composite thermal barrier coating affects the rate of thermal energy transfer away from a combustion cylinder.
Suggest one reason why the engineer performed three repeat trials of the temperature measurements for each formulation of the coating.
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.