Do you cool your tea when you blow on it?

When we pick up a very hot beverage, we intuitively want to blow on it to cool it down.But

Does it really work? Discuss

BBC Science Focus expert Dr Emma Davis notes that a person's breath is usually slightly warmer than air. So when you blow on a hot cup of tea, you actually cool it down a bit.

The hot, humid air when you try to cool the tea and blow on it is replaced by colder, drier air. This increases evaporation.

You can cool the tea even faster if you start itstir. This will speed up the convection process, during which the hottest part of the liquid from the bottom of the cup rises. In addition, agitation increases the surface area, and this contributes to the cooling and evaporation of the liquid.