In Fig. 28-54, a particle moves along a circle in a region of uniform magnetic field of magnitud...

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In Fig. 28-54, a particle moves along a circle in a region of uniform magnetic field of magnitude \( B=5.00 \mathrm{mT} \). The particle is either a proton or an electron (you must decide which). It experiences a magnetic force of magnitude \( 3.20 \times 10^{-15} \mathrm{~N} \). What are (a) the particle's speed, (b) the radius of the circle, and (c) the period of the motion?
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