Explanation:
I think this would help you. Read this and make your own answer ok.
This ain’t mine but here is someone else’s
Answer:

Explanation:
Pressure at the bottom of the building and at the top of the building must be related as



now we will have




now we have


1.) Pitch
2.)Wavelength
3.)Density/Elastic Properties-b. Two of the above
4.)Liquids
5.) I'm not sure but I'm pretty sure it's the Doppler effect
6.) Frequency Increases