Abell with a fundamental frequency of 880 hz is moving toward an observer at 3.5 m/s. if the speed of sound is 343 m/s, what pitch would be heard by the observer?

f = 889 Hz

Explanation:

As we know that when observer and source move relative to each other

Then in that case the frequency heard by the observer is different from actual frequency

The changed in the frequency is given as

now we know that

v = 343 m/s

now we have

1.   what is light?

light is an electromagnetic wave visible to the human eye. 

2. what is a reflection?

the rebounding of a light ray when it hits a mirror.

3. what is the incident ray?

contacts the surface of an object.

4. what is the reflected ray?

bounces off a reflective surface.

5. what is the normal ray?

perpendicular to the surface of a mirror.

6. what is the angle of incidence?

an angle formed by the incident ray and the normal.

7. what is the angle of reflection?

an angle formed by the reflected ray and the normal.

8. what is refraction?

(bending.)

9. what is a converging lens?

bring together light rays that pass through.

10. what is a diverging lens?

spreads out light passing through.

11. focal point?

the real point where the refracted rays meet when the incident rays run parallel.

i copy pasted btw from an website..