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A proton is moving at a speed of 3.2 × m/s at an angle of 80° to a uniform magnetic field of strength 1.5 × T. What is the distance moved by the proton along the spiral path as it completes one revolution? (This distance is called the "pitch" of the helix.)

A) 220 m

B) 1390 m

C) 1370 m

D) 240 m

E) Cannot be determined

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