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Консультация № 194456
17.01.2019, 21:55
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Добрый вечер уважаемые эксперты! Прошу вас помочь в решении задачи по физике.
Два одинаковых металлических заряженных шара находятся на расстоянии r = 50см. Сила отталкивания шаров F1 = 100 мкН. После того как шары привели в соприкосновение и удалили друг от друга на прежнее расстояние, сила отталкивания возросла и стала равной F2 = 200 мкН . Вычислить заряды Q1 и Q2, которые были на шарах до их соприкосновения. Диаметр шаров считать много меньшим расстояния между ними.
Заранее благодарю.
Два одинаковых металлических заряженных шара находятся на расстоянии r = 50см. Сила отталкивания шаров F1 = 100 мкН. После того как шары привели в соприкосновение и удалили друг от друга на прежнее расстояние, сила отталкивания возросла и стала равной F2 = 200 мкН . Вычислить заряды Q1 и Q2, которые были на шарах до их соприкосновения. Диаметр шаров считать много меньшим расстояния между ними.
Заранее благодарю.
Обсуждение
21.01.2019, 09:25
общий
это ответ
Здравствуйте, Hotty!
После соприкосновения у обоих шаров оказался заряд
Сила взаимодействия зарядов до соприкосновения
а после соприкосновения
Из уравнений (1), (2) получаем, что
Тогда, в соответствии с теоремой Виета, искомые заряды являются корнями квадратного уравнения
При этом
Подставляя в формулы (3), (4) числовые значения величин, получим
(Кл),
(Кл).
После соприкосновения у обоих шаров оказался заряд
Сила взаимодействия зарядов до соприкосновенияа после соприкосновения
Из уравнений (1), (2) получаем, что
Тогда, в соответствии с теоремой Виета, искомые заряды являются корнями квадратного уравнения
При этом
Подставляя в формулы (3), (4) числовые значения величин, получим
(Кл), (Кл).
Об авторе:
Facta loquuntur.
Facta loquuntur.
23.01.2019, 16:21
общий
Добрый день! Помогите с задачей: зачем дана масса, если можно воспользоваться газовыми законами?
Прикрепленные файлы:
23.01.2019, 17:09
общий
Адресаты:
oktyabrinabaeva Добрый день! Помогите с задачей: зачем дана масса, если можно воспользоваться газовыми законами?
Создайте новую консультацию со своим вопросом. Возможно, кто-нибудь из экспертов ответит Вам.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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