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Suppose the electric field between the plates P and P' in the mass spectrometer in following figure is 1.87 x 10⁴ V/m and the magnetic field in both regions is 0.661T .

2286_The mass spectrometer.jpg

Part A

If the source contains the three isotopes of krypton, 82Kr, 84Kr, and 86Kr, and the ions are singly charged, find the distance between the two adjaicent lines formed by the three isotopes on the photographic plate. Assume the atomic masses of the isotopes (in atomic mass units) are equal to their mass numbers, 82, 84, and 86. (One atomic mass unit = 1u = 1.66 x 10^-27 kg.)

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