The electrostatic field is generated by a positive

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The electrostatic field is created positively charged infinite wire. Proton, moving from the filament by the field intensity along line a distance r1 = 1 cm and r2 = 5 cm, its speed changed from 1 to 10 mm / s. Determine the linear charge density of the thread.

Task 30548. Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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