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Figure below shows a displacement – time graph per a progressive wave.
         figutr showing progressive wave

  1. State the amplitude of the wave. 
  2. Determine the frequency of the wave. 
  3. Given that the velocity of the wave is 20m/s, determine its wavelength. 

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  1. 5 cm
  2. Periodic time T = 25 – 5 = 20.
    Frequency = 1/11/20=0.05Hz
  3. V + Fh => h = v/F =   20    =                            400m
                                    0.05                                                                                                                                                                         
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