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Q1. An airplane flying horizontally at a constant speed of 350km/h over level ground releases a bundle of food supplies. Overlook the effect of the air on the bundle.

Q2. Two insulated wires, each 2.50 m long, are taped together to form a two-wire unit that is 2.50 m long. One wire carries a current of 7A; the other carries a smaller current I in the opposite direction. The two wire unit is placed at an angle of 78.0° relative to a magnetic field whose magnitude is 0.360T. The magnitude of net magnetic force experienced by the two-wire unit is 3.13N. What is the current I?

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