Pieces of stone or metal falling from space, made visible for part of their journey due to intense frictional heating.

learn more… | top users | synonyms

6
votes
4answers
4k views

After what speed air friction starts to heat up an object?

I understand that air friction cools off an object at low speeds. For example, if you blow on a spoon of hot soup, it cools off. Or if you swing a hot frying pan in the air, it cools off faster. But ...