Describe two energy conversions that take place when you warm a cup of cocoa in a microwave oven.

Electrical energy - > wave energy (microwave)

wave energy - > potential/heat energy (cup of cocoa)

1.) the microwaves are absorbed by the water molecules in the cocoa. this causes the water molecules to vibrate very fast.

2.) this fast vibration causes the molecules to heat themselves up by means of bumping into each other (friction).