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William Foster——Works at Microsoft, Lives in Seattle. Graduated from University of Washington with a degree in Computer Engineering.
A nutcracker is an example of a second-class lever. The fulcrum in the nutcracker is at one end, where the two metal rods of the device are hinged together. The effort force is applied at the opposite ends of the rods, and the resistance force, the nut to be cracked open, lies in the middle.read more >>+119962023-04-30 00:05:37
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