Chapter 13
Questions
Q13.3 v =sqrt(T/µ). Therefore, increase tension by a factor of 4.
Q13.5 No. A wave is not a solid object, but a chain of disturbance. As described by the principle of
superposition, the waves move through each other.
Q13.7 Amplitude is increased by a factor of sqrt(2) . No, the wave speed does not depend on the amplitude.
Q13.8 The section of rope moves up and down in SHM. The wave continues on, setting in motion, up and
down, further sections of the rope.
Q13.11 As the source frequency is doubled, the speed of waves on the string stays constant.
Problems
Chapter 14
Questions
Q14.5 Damping, and non–linear effects in the vibration.
Q14.9 Stick a bit of chewing gum to one tine of the second fork. If the beat frequency is then faster than 4
beats per second, the second has a lower frequency than the standard fork. If the beats have slowed
down, the second fork has a higher frequency than the standard. Remove the gum, add or subtract 4
Hz according to what you found, and your answer will be the frequency of the second fork.
Problems
