JAMB - Physics (2001 - No. 8)
Ice cubes are added to a glass of warm water. The glass and water are cooled by
conduction only
convection only
conduction and convection
convection and radiation
הֶסבֵּר
heat is transferred from the water to the ice/glass through direct contact(conduction) additionally, there is some convective heat transfer within the water as warmer water rises and cooler water sinks.