In houston, earth's b⃗ field has a magnitude of 5.2×10−5t and points in a direction 57∘ below a horizontal line pointing north. part a part complete determine the magnitude of the magnetic force exerted by the magnetic field on a 10-m-long vertical wire carrying a 14-a current straight upward. express your answer with the appropriate units. f f = 4.0×10−3 n submitprevious answers correct significant figures feedback: your answer 3.96⋅10−3n was either rounded differently or used a different number of significant figures than required for this part. part b determine the direction of the magnetic force. determine the direction of the magnetic force. to the west to the east to the north to the south