Exam-style question
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A wave has a frequency of 50 Hz and a wavelength of 1.2 m. What is the wave speed?.
- A.60 m/s
- B.50 m/s
- C.40 m/s
- D.30 m/s
Model answer
What a good answer should say
- 60 m/s
Explanation
Why this works
Using the wave speed formula v = f × λ, we substitute the values: v = 50 Hz × 1.2 m = 60 m/s. Thus, the wave speed is 60 m/s.
Common mistake
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