The Figure shows a transverse wave at one instant.
Figure

State which arrow, P, Q or R, shows the amplitude of the wave.
State which arrow, P, Q or R, shows the wavelength of the wave.
Waves transfer energy from one place to another.
Give one other thing that waves can transfer.
State what is meant by the frequency of a wave.
Give the unit of frequency.
112 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties, covering 4.1.1 Waves transfer energy and information, 4.1.2 Frequency, wavelength, amplitude, period and wavefronts, 4.1.3 Longitudinal and transverse waves, 4.1.4 The wave speed equations, 4.1.5 Measuring wave velocity, and 4.1.6 Calculating depth or distance from waves. Each one has a worked solution and a mark scheme showing where the marks go.