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An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.265 T....

An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.265 T. If the kinetic energy of the electron is 4.50 ✕ 10−19 J, find the speed of the electron and the radius of the circular path.

(a) the speed of the electron
m/s

(b) the radius of the circular path
μm

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