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Vlad1618 [11]
3 years ago
12

Trumpeter A holds a B-flat note on the trumpet for a long time. Person C is running towards the trumpeter at a constant velocity

. Person B is running away from the trumpeter at the same rate. Person D is standing still the whole time.
Which person hears a note that is higher than the B-flat?
A) Person A
B) Person B
C) Person C
D) Person D
Physics
2 answers:
Allisa [31]3 years ago
8 0

Answer: the answer is c

Explanation:

 

Person C hears a note that is higher than a B-flat. This is because as the runner approaches the stationary trumpeter, the sound waves become compressed. This reduces the wavelength and increases the frequency.

(usa testprep explanation)

Vikki [24]3 years ago
5 0
You didn't mention it, but the trumpeter herself has to be standing still.

<span>Person C, the one running towards the trumpeter, hears a pitch
that is higher than B-flat.  (A)

Person B, the one running away from the trumpeter, hears a pitch
that is lower than B-flat.

Person D, the one standing still the whole time, hears the B-flat.</span>
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Answer:

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where Θ is the angle between F_1 and x-axis.

F_1_x = K\frac{Qq}{x^2 + y^2}(\frac{x}{\sqrt{x^2 + y^2}}) = \frac{KQqa}{(a^2 + y^2)^{3/2}}

whereas

F_2_x = K\frac{-Qq}{a^2 + y^2}(-\frac{a}{\sqrt{a^2 + y^2}}) = \frac{KQqa}{(a^2 + y^2)^{3/2}}

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