Exam-style question
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What is the wave speed of a wave with a frequency of 10 Hz and a wavelength of 2 m?.
- A.5 m/s
- B.20 m/s
- C.15 m/s
- D.10 m/s
Model answer
What a good answer should say
- 20 m/s
Explanation
Why this works
The wave speed (v) can be calculated using the formula v = f × λ, where f is the frequency and λ is the wavelength. Substituting the values, we have v = 10 Hz × 2 m = 20 m/s.
Therefore, the wave speed is 20 m/s.
Common mistake
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