What happens if you put tiny beads inside a box and shake it like crazy? The beads collide with each other, and heat is produced. Then what if you put water in and shake it? The water gets hot, too. This way, you can heat water without using fire. But you can't shake it every time you want to heat water, right? So an engineer thought, could I make
A "Canadian well" uses underground pipes and earth's stable temp (8-15°C) to pre-warm air in winter and pre-cool it in summer. How a Canadian well works?
Most cars blow air into your face through vents like this, but look what happens in this one. Push this button and a panel slides down where it acts as a sort of radiator. First car I've ever been in that's got central heating. And there's a dehumidifier in here too, so the windows cannot steam up no matter what you get up to. Happily, I can test
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