A wave has frequency 200 Hz and wavelength 2 m. What is its speed?

Answer and explanation

Correct answer: B. 400 m/s

  1. Step 1: Wave equation: .
  2. Step 2: m/s.
Answer
400 m/s.
Why not the others: 100 m/s: it divides frequency by wavelength. 0.01 m/s: it divides wavelength by frequency. 202 m/s: it adds the numbers.

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