Difference in sound that pours "water" and "hot water" why anyone understands

Everyone should have experiences poured cold drinks and other hot water into the cup while living everyday, but there is a difference in the sound when pouring this water and hot water, so that anyone can hear the difference Is shown in the movie.

You Can Hear The Difference Between Hot and Cold Water - YouTube


YouTuber to provide science-based contentSteve MoldMr. appeared and said, "You have supernatural powers you do not realize.It's the ability to listen to temperature differences and I want to test it from now."


Both containers with water and hot water will use the same pot.


I will do the test using the same thing that pour water and hot water cups. Because there is a possibility that it will appear in appearance, you can hide the spout and hear only the sound.


JOLLOJORO and water or hot water is poured for saying "POUR 1", but at this point it is expected that "This sound is not good ... ...?"


The other liquid is poured at "POUR 2", but by comparing the two, I heard that "This is a problem" by asking.


Which is water or which is hot water is clearly shown in the movie soon. Sound test pouring water and hot water and the result48 seconds of the movieAs you see from it you will understand.


Why the difference between the two sounds is that the viscosity of water depends on the temperature. It is an example that honey is easy to understand, cold honey is sticky because of its high viscosity, but warm honey has a lower viscosity, the same as flowing a trout.


In the case of water, there is not much change as much as honey, so it seems that you do not see it in appearance other than hot water steam. On the other hand, it is said that the sound when water and hot water with slightly different viscosity are poured into the cup will make a difference due to complicated hydrodynamic reasons.



"This is a very interesting phenomenon because you already have this knowledge because cold drinks and hot drinks you drink in your life made it possible to distinguish intuitively, Mr. Mould concludes.