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melisa1 [442]
3 years ago
10

MY NOTES

Physics
1 answer:
AnnZ [28]3 years ago
6 0

Answer:

Explanation:

The original frequency of sound being emitted f₀ = 1800

Its velocity towards the observer v ( let )

Apparent frequency f = 2130

velocity of sound = V

 f=f_0\times\frac{V}{(V - v)}

Placing the given values

2130=1800\times\frac{343}{(343 - v)}

1.1833 = \frac{343}{343 - v}

1.1833 v = 62.87

v = 53.13 m /s .

b ) In the second case

formula for apparent frequency

f=f_0\times\frac{V+v}{(V - v)}

Substituting the values

f=1800\times\frac{343+53}{(343 - 53)}

= 2458 Hz .

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