eli5, how do wind turbines spin if the wind is pushing on both the top and bottom of the propeller?
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The blades are angled, so a wind that hits them face on will push them sideways, causing them to rotate around the centre. The blade at the bottom is rotated 180° relative to the one at the top, so one will be pushed to the left and the other to the right, meaning they both rotate in the same direction around the centre.
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