And we all know that cold air is more dense and makes more horsepower than hot air. Any hot rodder who has ever operated an air compressor to drive a high-speed die grinder knows that compressing ...

But if you purse your lips and let rip a "hoo" from a distance, it will feel cool. This is the result of a process known as entrainment. Essentially, pursing your lips and forcing out air creates a ...

I'm told this makes me good at warm hugs—but it also means that, given a mesh seat, my body will pour heat through it at an immense rate and I'll end up feeling very cold as a result.

A fan helps by replacing this hot, humid air with cooler, drier air, allowing for more evaporation. An air conditioner provides cold air inside your home by removing heat and humidity from the ...