Wavelength 2 m, speed 400 m / s, how many oscillations the wave makes in 0.1 s.
| February 10, 2021 | education
λ = 2 m.
V = 400 m / s.
t = 0.1 s.
N -?
The frequency of oscillations v is the number of oscillations N per unit time t. The vibration frequency v is determined by the formula: v = N / t.
N = v * t.
The speed of propagation of the wave V in the medium is determined by the formula: V = λ * v, where λ is the wavelength, v is the frequency of the wave.
Let us express the vibration frequency v by the formula: v = V / λ.
The formula for determining the number of oscillations N will have the form: N = V * t / λ.
N = 400 m / s * 0.1 s / 2 m = 20.
Answer: during the time t = 0.1 s, the wave makes N = 20 oscillations.
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