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In a certain region, the earth's magnetic field has a magnitude of 4.5×10−5 T and is directed north at an angle of 60∘ below the horizontal. An electrically charged bullet is fired north and 15∘ above the horizontal, with a speed of 720 m/s. The magnetic force on the bullet is 3.9×10−10 N, directed due east. Determine the bullet's electric charge, including its algebraic sign (+ or -). Number Units

In a certain region, the earth's magnetic field has a magnitude of 4.5×10−5 T and is directed north at an angle of 60∘ below the horizontal. An electrically charged bullet is fired north and 15∘ above the horizontal, with a speed of 720 m/s. The magnetic force on the bullet is 3.9×10−10 N, directed due east. Determine the bullet's electric charge, including its algebraic sign (+ or -). Number Units

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In a certain region, the earth's magnetic field has a magnitude of 4.5 × 10 − 5 T and is directed north at an angle of 60 ∘ below the horizontal. An electrically charged bullet is fired north and 15 ∘ above the horizontal, with a speed of 720 m / s . The magnetic force on the bullet is 3.9 × 10 − 10 N , directed due east. Determine the bullet's electric charge, including its algebraic sign (+ or -).
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