Author Question: One reason for the higher pitch of your voice after you've inhaled some helium is that sound travels ... (Read 152 times)

azncindy619 · **on:** Jul 29, 2018

One reason for the higher pitch of your voice after you've inhaled some helium is that sound travels

A) slower in helium than in air.
B) faster in helium than in air.
C) the same speed in helium but with a longer wavelength.

Question 2

Refraction of sound can occur in

A) air.
B) water.
C) both of these
D) neither of these