$$In the context of wave functions, to what physical quantity is the $\mathrm{amplitude}$ most directly related?

Which type of wave requires a medium to travel?

Which of the following statements about wave functions is true?

If the speed of a wave ($v$) increases while its wavelength ($\lambda$) remains constant, what happens to the wave's frequency ($f$)?

Which of the following is the primary cause of mechanical waves?

In a diagram of a sinusoidal wave, which part of the diagram represents the $amplitude$ of the wave?

In which of the following types of waves does the disturbance move in the same direction as the wave propagation?

Which particles exhibit properties of $waves$ in some experiments?

Which of the following properties makes a light wave different from all mechanical waves?