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Tina is driving her sports car down US1, traveling 27m/s. She sees her friend Rita up ahead, waiting to cross the street at the next intersection. Tina quickly slams down on the horn. If the horn has a frequency of 400Hz, which of the following is the only possible frequency heard by Rita, as Tina drives away from Rita?

Respuesta :

Answer:

[tex]f_1 = 370.8 Hz[/tex]

Explanation:

As Tina drives away from Rita

so here we can use the concept of doppler's Effect

[tex]f_1 = f_0(\frac{v}{v+v_s})[/tex]

here we know that

[tex]f_0 = 400 Hz[/tex]

[tex]v_s = 27 m/s[/tex]

[tex]v = 343 m/s[/tex]

now we have

[tex]f_1 = f_0(\frac{v}{v + v_s})[/tex]

[tex]f_1 = 400(\frac{343}{343 + 27})[/tex]

[tex]f_1 = 370.8 Hz[/tex]

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