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Lorico [155]
3 years ago
11

According to the Doppler effect, if a car with a blowing horn is moving toward you, the pitch you hear will

Mathematics
2 answers:
harina [27]3 years ago
5 0

Answer:

If a car with a blowing horn is moving toward you, the pitch sounds higher than the actual emitted frequency.

Step-by-step explanation:

In figure,

        V= speed of wave

         U= speed of car

When car moving towards you, then

Car travels a distance in time T = VT

 Wave travels a distance in time T = UT

From figure,

                    change in wavelength (λ') = VT - UT= T(V-U)

Now,

        V = λ' f'         (f' →frequency observed by you)

         f' = V ÷ λ' = \frac{V}{T(V-U)}

We know that

                      \frac{1}{T} = f

Then,

        f' =  \frac{Vf}{V-U}

        f' = \frac{f}{1-\frac{U}{V} }

Hence, we can say that

           frequency increases as source moves toward you.

USPshnik [31]3 years ago
5 0

Answer:

B. Increase

Step-by-step explanation:

The closer together the crests, the higher the frequency (or pitch)

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