Four identical containers each hold the same quantity of soup at the same initial temperature. The containers are left in the same surroundings for 20 minutes.
Containers P and Q use the same insulating material, but Q has a thicker layer of insulation. Containers R and S have insulation of the same thickness, but the material around R has a lower thermal conductivity than the material around S.
Which statement predicts the temperature changes correctly?
P has a smaller temperature decrease than Q, and S has a smaller temperature decrease than R.
P has a smaller temperature decrease than Q, and R has a smaller temperature decrease than S.
Q has a smaller temperature decrease than P, and S has a smaller temperature decrease than R.
Q has a smaller temperature decrease than P, and R has a smaller temperature decrease than S.
104 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.