for number 8: B and F are the wavelengths (its on the pic)
for number 9: B is the only one there (its on the pic also)
for number 10: The shorter the wavelength, the higher the frequency, and the higher the pitch, of the sound. In other words, short waves sound high; long waves sound low.
for number 11: soft sound has small amplitude and louder sound has a large amplitude.
Answers & Comments
Answer:
8. A
9. A
10. B or C?
11. C
Explanation:
for number 8: B and F are the wavelengths (its on the pic)
for number 9: B is the only one there (its on the pic also)
for number 10: The shorter the wavelength, the higher the frequency, and the higher the pitch, of the sound. In other words, short waves sound high; long waves sound low.
for number 11: soft sound has small amplitude and louder sound has a large amplitude.