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Консультация № 199165
12.09.2020, 22:03
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Здравствуйте! У меня возникли сложности с таким вопросом:
Свисток, совершающий колебания на частоте 500 Гц, движется по окружности радиусом 1 м, делая 3 оборота в секунду. Определите наибольшую и наименьшую частоту, воспринимаемую неподвижным наблюдателем, находящимся на расстоянии 5 м от центра окружности. Скорость звука в воздухе принять равной 340 м/с.
Сделать рисунок.
Свисток, совершающий колебания на частоте 500 Гц, движется по окружности радиусом 1 м, делая 3 оборота в секунду. Определите наибольшую и наименьшую частоту, воспринимаемую неподвижным наблюдателем, находящимся на расстоянии 5 м от центра окружности. Скорость звука в воздухе принять равной 340 м/с.
Сделать рисунок.
Обсуждение
13.09.2020, 10:54
общий
это ответ
Здравствуйте, dar777!
Дано:
f0=500 Гц
v0=340 м/с
R=1 м
n=3 с-1
L=5 м
Найти:
fmax; fmin
Решение:
Здесь работает эффект Доплера. Максимальная частота будет при приближении источника звука к приемнику. Рассчитать ее можно по формуле:
fmax=f0*v0/(v0-vист) ............. (1)
Минимальная частота при удалении источника от приемника:
fmin=f0*v0/(v0+vист) ............. (2)
Скорость источника
vист=2*<pi>*n*R = 18,8 м/с.
Тогда, по формуле (1)
fmax= (~529 Гц)
По формуле (2)
fmin= (~474 Гц)
Дано:
f0=500 Гц
v0=340 м/с
R=1 м
n=3 с-1
L=5 м
Найти:
fmax; fmin
Решение:
Здесь работает эффект Доплера. Максимальная частота будет при приближении источника звука к приемнику. Рассчитать ее можно по формуле:
fmax=f0*v0/(v0-vист) ............. (1)
Минимальная частота при удалении источника от приемника:
fmin=f0*v0/(v0+vист) ............. (2)
Скорость источника
vист=2*<pi>*n*R = 18,8 м/с.
Тогда, по формуле (1)
fmax= (~529 Гц)
По формуле (2)
fmin= (~474 Гц)
5
Это самое лучшее решение!
Об авторе:
С уважением
shvetski
С уважением
shvetski
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