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Консультация № 136751
14.05.2008, 07:45
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Здравствуйте Уважаемые Эксперты! Помогите пожалуйста с решением задачки..
Какую минимальную скорость должен иметь протон, чтобы достигнуть поверхности заряженного до 400 В металлического шара, если начальное расстояние до его поверхности в 3 раза больше радиуса.
Заранее благодарна!!
Какую минимальную скорость должен иметь протон, чтобы достигнуть поверхности заряженного до 400 В металлического шара, если начальное расстояние до его поверхности в 3 раза больше радиуса.
Заранее благодарна!!
Обсуждение
14.05.2008, 08:55
общий
это ответ
Здравствуйте, Luba!
Потенциал обратно пропорционален расстоянию и в исходной точке равен 400/3 В
Разность потенциалов 400-400/3=800/3 В
Работа по преодолению разности потенциалов и минимальная кинетическая энергия A=U*e=4.27*10^-17Дж
Скорость v=√(2*A/m)=226*10^3 м/с=226км/с
Потенциал обратно пропорционален расстоянию и в исходной точке равен 400/3 В
Разность потенциалов 400-400/3=800/3 В
Работа по преодолению разности потенциалов и минимальная кинетическая энергия A=U*e=4.27*10^-17Дж
Скорость v=√(2*A/m)=226*10^3 м/с=226км/с
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