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An electron experiences the greatest force as it travels 2.9 X 106 m/s in a magnetic field when it is moving north-ward. The force is

An electron experiences the greatest force as it travels 2.9 X 106 m/s in a magnetic field when it is moving north-ward. The force is upward and of magnitude 7.2 X 10-13N. What are the magnitude and direction of the magnetic field?

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