Answer:
f = 4000 / 30 sec = 133.3 vibrations/sec
P = 1 / f = .0075 sec period of 1 vibration
I have to guess it is force
Answer:
C. It is the result of diffraction
Explanation:
I just took the test
<span>here u go!
fiber-Optics
Mirrors
Sonar
Radar
Study of seismic waves </span>
