Archaeologists use a mass spectrometer to separate the nitrogen isotopes ^14N and ^15N. The +1 ions of ^15N enters the spectrometer with a speed of 8.5 km/s, and they travel in a circular arc of radius 25.0 cm. The magnetic field in the spectrometer has strength 5.29 x 10^-3T. What is the mass of a ^15N atom? Let the charge on a proton q = 1.6 x 10^-19 C.

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