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de Broglie Waves

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What is the de Broglie wavelength of a 145 g baseball traveling at 30.0 m/s (67.1mph)? Is the wavelength much larger or smaller than the diameter of an atom (on the order of 100 pm)?

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The expert examines de Broglie wavelength (lambda)= h/mv.

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de Broglie wavelength (lembda)= h/mv
h = 6.626*10^(-34) J.s
m = ...

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