nut cracker is what kind of simple machine ?
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Science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws.
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LEVER
Explanation:
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 roads , and the resistance force ,the nut to be cracked open, lies in the middle .
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