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Q. A wire 0.59 m long carrying a current of 10.0 A is at right angles to a uniform magnetic field. The force on the wire is 0.10 N. What is the strength of the magnetic field?

Q. A 99 kg man lying on a surface of negligible friction shoves a 71 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result?

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