The diagram above represents part of a wave motion in air. If the wave travels…

Physics WAEC 1990

The diagram above represents part of a wave motion in air. If the wave travels with a speed of 300ms-1calculate the frequency of the wave.

  • 360Hz
  • 300Hz
  • 250Hz checkmark
  • 150Hz
  • 100Hz

The correct answer is: C

Explanation

21/2λ = 3m; λ = 1.2m v= 300
f = v/x = 300/1.2 = 250Hz
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