A force, either wind or movement energy, has to be applied for something to turn.
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If you could dig through to the other side of the world, you’d be passing through layers of extremely hot, molten rock and solid rock under great pressure.
Have you ever boiled rice or pasta and wondered why it rises and falls?
Bubbles behave differently in a fluid due to their size, density, surface area and friction.
Irrigation is most efficient when water is delivered directly to a crop's target root zone.
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