1. If the tension in a guitar string is increased by 20%, by whatpercentage does the wave speed increase?
a. 4.5%
b. 9.5%
c. 14%
2. Which one of the following statements is correct?
a. The intensity of a wave isproportional to the square of itsamplitude.
b. Theintensity of a wave is proportional to the squareroot of its amplitude.
c. The intensity of awave is proportional to its amplitude.
3. Harmonic waves are produced by a source that isoscillating in SHM. Which one of the following statements iscorrect concerning harmonic waves?
a. Harmonic waves canonly be described mathematically by cosinefunctions.
b. Harmonicwaves can only be described mathematically by sinefunctions.
c. Harmonic waves can be describedmathematically by either sine or cosine functions.