Key Concepts: Waves are described by amplitude, wavelength, frequency, and period. $v = f\lambda$ and $f = 1/T$.
Section A: Definitions
1. Define amplitude and wavelength. [4]
2. Define frequency and period. [4]
Section B: Calculations
3. A wave has frequency 4 Hz and wavelength 2.5 m. Calculate wave speed. [2]
4. A wave has period 0.2 s. Calculate frequency. [2]
Total marks: 12
Mark Scheme
1. Amplitude: max displacement; wavelength: distance between repeating points [4]
2. Frequency: waves per second; period: time for one wave [4]
3. $v = f\lambda = 4 \times 2.5 = 10\,m/s$ [2]
4. $f = 1/T = 1/0.2 = 5\,Hz$ [2]