A) State the term for a wave in which particles vibrate at right angles to the direction of travel. b) i) The change of direction of the wave is called . ii) State why the wave changes direction

Speed of the wave in deep water, $v = 35 \, \text{cm/s}$.
From Fig. 6.1, the wavelength in deep water, $\lambda = 5.2 \, \text{cm}$ (the distance between two consecutive wave crests).

The relationship between speed ($v$), frequency ($f$), and wavelength ($\lambda$) is given by:

Rounding to three significant figures:

The frequency of the wave is $\boxed{\text{6.73 Hz}}$.