A physics instructor uses a long, horizontally suspended helical spring to demonstrate different types of waves.
Describe how the instructor must move the end of the helical spring to create a longitudinal wave along it.
State one physical example of a longitudinal wave.
An oceanographic monitoring station uses a lightweight indicator ring threaded onto a vertical guide pole anchored to the seabed. As ocean swell waves pass, the indicator ring slides vertically up and down.
The diagram below shows the profile of a water wave at a certain instant.
State the definition of the term wavelength.
The vertical distance between the crest at level P and the trough at level Q is 2.8 m2.8\text{ m}2.8 m. Determine the amplitude of the wave.
The indicator ring reaches its maximum height, level P, every 5.0 s5.0\text{ s}5.0 s. Calculate the frequency of the wave. State the unit.
Explain how the motion of the indicator ring demonstrates that the water wave is a transverse wave.
Give one example of a transverse wave other than a water wave.
