Practise predicting infrared emission from surface temperature, area and texture, and ranking objects with CAIE IGCSE Physics questions and mark schemes.
A metal container is used to cook food. The metal container has thick walls. Hot cooking oil at a temperature of 120∘C is poured into the container.
The metal container is spherical. The spherical container has a smaller surface area than a long, thin container of the same volume.
Explain the advantage of using a spherical container.
less thermal energy emitted or less space for energy to be lost