# Why is cup containing coffee hot?

It happened that I was having my coffee and saw this video at the same time. It's an interview given by RP.Feynamn. In that Feynman explains about why is a cup containing coffee hot, he says that as coffee is hot the kinetic energy of atoms in coffee are transferred to that of cup and hence it gets hot too!

The answer was satisfying to me but something bothered me after a while.

If atoms in the cup are in motion then why don't I feel the jiggling of those atoms?

The possible answer that I think is that the kinetic energy isn't enough to feel. For instance instead of putting hot coffee and heating the cup let's heat the cup on a flame. Then it's obvious that it will break after a while which is exactly what happens if the atoms starts much jiggling.

My question:-

$$(1)$$- Is my explanation to it correct?

• You do feel it when you touch a cup of hot coffee and it feels hot. Can you clarify what you are expecting to feel? Feb 8, 2022 at 5:05
• @DanDan0101, I was actually talking about sensation of movement of atoms inside of cup. Feb 8, 2022 at 14:17
• You ARE feeling the sensation of movement of atoms... that is what your brain processes as "heat" Feb 8, 2022 at 15:24