A student is observing standing waves. Changing the frequency of oscillation of a vertical string produces various harmonics. She changed the frequency from 30Hz to 60Hz. Which of the following must change as a result of this adjustment? Mark all that apply. a
The velocity must double
b
The wavelength must double
c
The velocity will remain the same
d
The wavelength must half
e
The velocity must half
f
The wavelength will remain the same