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A proton is traveling horizontally at 5.4 × 106 m/s in a direction 45o north of west. A magnetic flux density has a magnitude of 0.25 T and is directed north. What is the force on the proton?
Answer 1.5 × 10-13 N, up
2.1 × 10-13 N, down
1.5 × 10-13 N, down
2.1 × 10-13 N, up

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