Physics · May / June 2018 · Paper 12 · Question 25

The diagrams show four identical cans with their outside surfaces either polished silver or painted dull black. Each can contains the same volume of water, initially at 80 °C. After five minutes in a cool room, which can contains the coolest water?

1. Adull black
2. Bpolished silver
3. Cdull black
4. Dpolished silver

As printed in the paper