the unit for amount of substance. One * is the amount of any substance that contains the same number of particles as there are carbon atoms in 12g of carbon-12
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Card 7
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a wavefront with zero curvature, waves from distant sources are decribed as having this
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Card 8
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the rotating part of an electric motor or generator
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Card 9
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an electromagnetic machine that transforms voltages be inducing e.m.f. without physical movement, alternating current produces the necessary flux
