In the latest video by It’s Okay To Be Smart, host Joe Hanson talks about cold. He explains that while we feel cold in the winter, that technically, there isn’t such a thing as “cold.” It’s not there and you really can’t feel cold, it’s more about what isn’t there.
The point he’s making boils down to matter. Matter is made up of atoms, which are moving around constantly. When the temperature drops, we aren’t feeling the cold coming in. We are actually feeling heat flowing out.
He covers three ways heat can be transferred: conduction, convection and radiation. These methods are the same ways that heat leaves our body going from one environment to the next. Hanson poses interesting questions such as:
Which is colder, a hot tea kettle or an iceberg?
Why does a cold wind make us feel colder?
And he continues to explain why certain things are cold to the touch and why you can’t touch a hot pot, but you can put your hand in an oven.
Source: It’s Okay To Be Smart