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posledela
2 years ago
11

A car horn creates a 595 hz tone

Physics
1 answer:
Mademuasel [1]2 years ago
5 0

Answer: 668.68 Hz

Explanation:

$$Let:\\$v=$ Velocity of sound with respect to ground\\$v_{0}=$ Velocity of observer\\$V_{S}=$ Velocity of source\\$f=$ Actual frequency \\$f^{\prime}=$ Observed frequency\\The observed frequency is given by$$f^{\prime}=\left(\frac{v-v_{0}}{v-v_{s}}\right) f$$

$$Given:\\\\begin{aligned}f &=595 \mathrm{H} 2 \\v_{s} &=20 \mathrm{~m} / \mathrm{s} \\v_{0} &=-20 \mathrm{~m} / \mathrm{s} \\v &=343 \mathrm{~m} / \mathrm{s} \\\therefore \quad f^{\prime} &=\left(\frac{v-v_{0}}{v-v_{s}}\right) f \\f^{\prime} &=\left(\frac{343-(-20)}{343-20}\right) \times 595\end{aligned}$$$f^{\prime}=668.68 \mathrm{~Hz}$ is the observed frequency.

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