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Q1. A 1.10m long straight wire section has a resistance R = 110 ohm and is connected, with conducting wire of negligible resistance, to a 1.5 V battery. The wire is located in a uniform magnetic field B directed perpendicular to that section of wire. Compute the magnitude of B while the force on the wire because of B has a magnitude of 0.270 N.

Q2. A soccer ball with a mass of 448g bounces off the crossbar of a goal and is deflected upward at an angle of 56.2° with respect to horizontal. Immediately after deflection, the kinetic energy of the ball is 47.70 J. What are the vertical and horizontal components of the ball's momentum right away after striking the crossbar? (Let the horizontal direction be the x-direction and the vertical direction be the y-direction.)

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