Задача id9625

Between the plates of a flat air horizontal capacitor there is a charged drop of oil with a mass m = 3 • 10-8 g. The charge of the drop is q = 3 • 10-15 C. When the potential difference between the plates is U = 500 V and the initial speed v0 = 0, the drop travels a certain distance 2 times slower than in the absence of an electrostatic field. Find the distance between the plates. Neglect air resistance.

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