A wave has frequency 440 Hz and wavelength 4 m. What is its speed?
Answer and explanation
Correct answer: B. 1760 m/s
- Step 1: The wave speed is v = f x wavelength.
- Step 2: v = 440 x 4 = 1760 m/s.
Answer
1760 m/s.
Why not the others: Speed is the product of frequency and wavelength; dividing, adding or doubling does not give the speed.
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