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andrezito [222]
4 years ago
7

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 frequency that is lower than the B-flat?
A) Person A
B) Person B
C) Person C
D) Person D
Physics
2 answers:
rewona [7]4 years ago
8 0

The person running towards the trumpet, Mr. C,
hears a higher frequency.

The person running away from the trumpet, Mrs. B,
hears a lower frequency.

The trumpeter, Mr. A, and the person who is just standing still
and listening, Miss D, both hears the beautiful perfect B-flat.

V125BC [204]4 years ago
6 0

Answer:B

Explanation:Making fast and simple :)

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if the intensity of a person's voice is 4.6 x 10^-7 w/m^2 at a distance of 2.0 m, how much sound power does that person generate
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The sound power the person generated is 2.313 \times 10^{-5} \ W.

<h3>Area of the sound wave</h3>

The area of the sound wave is calculated as follows;

A = 4\pi r^2\\\\A = 4 \pi \times (2)^2\\\\A = 50.272 \ m^2

<h3>Power generated</h3>

The sound power the person generated is calculated as follows;

P = I A\\\\P = 4.6\times 10^{-7} \ W/m^2 \ \ \times \ \ 50.272 \ m^2\\\\P = 2.313 \times 10^{-5} \ W

Learn more about intensity of sound here: brainly.com/question/4431819

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