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Задать вопрос экспертам

Консультация № 192187

21.12.2017, 15:58

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Образование

Помогите с задачей

Звуковые колебания с частотой 450 Гц и амплитудой 0,3 мм, распространяются в
упругой среде. Длина волны 80 см. Записать уравнение бегущей гармонической волны
(в СИ). Начальная фаза равна нулю.

Обсуждение

давно

Посетитель
226425
1567

21.12.2017, 22:21

общий

это ответ

Здравствуйте, stounsound1996!
Дано:
(nu)=450 Гц
A = 0,3*10^-3 м
[$955$] = 0,8 м
[$966$]₀ = 0
Найти: S(x,t)
Решение:
Уравнение гармонической волны
S = A*sin[[$969$](t-x/v)+[$966$]₀]
здесь
[$969$] = 2*pi*nu = 900*pi с^-1 - циклическая частота колебаний
v = [$955$]*nu = 360 м/с - фазовая скорость волны.
А и [$966$]₀ возьмите из условия.
Подставьте в уравнение значения А, [$969$], v - получите то, что вам нужно.

Удачи

Об авторе:
С уважением
shvetski

давно

Посетитель
401631
4

22.12.2017, 09:53

общий

Большое спасибо)

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