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Консультация № 197888
29.02.2020, 14:36
0.00 руб.
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Уважаемые эксперты! Пожалуйста, помогите решить задачу:
Две проволоки, изготовленные из одинаковых металлов, отличаются по длине в 3 раза, а по диаметру – в 2 раза. Во сколько раз могут отличаться их сопротивления?
Две проволоки, изготовленные из одинаковых металлов, отличаются по длине в 3 раза, а по диаметру – в 2 раза. Во сколько раз могут отличаться их сопротивления?
Обсуждение
29.02.2020, 19:18
общий
это ответ
Здравствуйте, artemys03!
Сопротивление отрезков проволоки:
где: L -длина проводника, S -площадь поперечного сечения.
где D -диаметр проводника;
В задаче нечётко сформулировано условие о соотношении длин и диаметров. Если:
Если:
Сопротивление отрезков проволоки:
где: L -длина проводника, S -площадь поперечного сечения.
где D -диаметр проводника;
В задаче нечётко сформулировано условие о соотношении длин и диаметров. Если:
Если:
5
Об авторе:
Понеже не словес красных бог слушает, но дел наших хощет
Понеже не словес красных бог слушает, но дел наших хощет
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