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What is the (a) momentum, (b) speed, and (c) de-Broglie wavelength of an electron with kinetic energy of 120 eV.

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What is the (a) momentum, (b) speed, and (c) de-Broglie wavelength of an electron with kinetic energy of 120 eV.

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Kinetic energy, K.E = 120 eV = 120 x 1.6 x 10-19 

K = K.E = 1.92 x 10-17 J

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