a) Calculate the speed of the wave pulse.
90÷1.69 = 53.3 (3 s.f.)
Speed: 53.3 cm/s
b) Is it possible to change the speed of the wave pulse (of the same width)?
Yes, it is possible only when the tension is adjusted.
[At first (No changes made)]
[Change in Amplitude (Higher amplitude)]
[Change in Amplitude (Lower amplitude)]