Can you solve it? Physics puzzles for smart students

How to cool your coffee and other crucial questions

Today’s puzzles have been suggested by he Department of Physics at Oxford university, for reasons that will become clear below.

They kick off with a question that could change your life, that is, if you are always burning your mouth on hot coffee.

1) Add milk right away, then wait a few minutes before drinking.

2) Wait a few minutes, then add milk just before drinking.

1) it goes up

2) it goes down

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