posted by Jon .
1)A wave created when two different waves meet will have an amplitude greater than the individual waves because of.
D)a change in boundary
I got B
2)If a wave has a period of .02 seconds and a speed of 4 m/s, what is its wavelength?
3)The Doppler effect is a change in the ______of a sound.
yes, on all three, on the third, I would use the term frequency, or apparent frequency. Pitch is ok.