Physics · Oct / Nov 2025 · Paper 11 · Question 17

Four metal cans are identical except for the colour and the texture of their outer surfaces. 100 cm³ of water at 70 °C is poured into each can. Which can cools the most rapidly?

1. Ablack, rough
2. Bblack, shiny
3. Cwhite, rough
4. Dwhite, shiny

As printed in the paper