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A particle has a mass of 1.67x10-27kg, and charge of 1.6x10-19C, and moves in a circular path of radius 21cm perpendicular to a magnetic

A particle has a mass of 1.67x10-27kg, and charge of 1.6x10-19C, and moves in a circular path of radius 21cm perpendicular to a magnetic field equal to 4000G Find (a) the speed of the particle and (b) the period of the motion.

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