8 Calculate the De Broglie wavelength of an electron traveling with a velocity of 9.0 * 103 kilometers per second. The mass of an electron is 9.1 x 10-28 g. )(C= 3 x 108 m/s, h=6.63x10-34 J·s) (1 Point) 8.1 m 8.1 x 10-8m 8.1 x 'm 8.1 x 10-14m
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