Proton flew into crossed at an angle of 120 ° magnetic (B = 50 mT) and electric (E = 20 kV / m) homogeneous field. Determine the acceleration of the proton at the time of entry into the area of the fields, if the rate of 4 × 10 5 m / s and perpendicular vectors and E.

Detailed solution shorthand terms, formulas and laws used in the decision, the withdrawal of the calculation formula and the response.
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