Depend on the settings of microwave oven.
:) The energy "microwave" emitten by the microwave oven helps
vibrate the water molecules. That's how heating up of food
works.
If the amount of total energy emitted by the oven is less than
the total amount of energy require to vibrate the water molecules
to you desired temperature in kelvin, then the both cup of water
will be less 'hot'.
If the amount of total energy emitted by the oven exceed the
amount of energy require to vibrate the water molecules in both
cups, then both cups of water will be equally hot.
P.s. depend on your microwave oven settings
Best Regards,
Chin Seng.
Homework Forum Moderator.