SOLVING

    Cards (7)

    • How many periods are there in Figure A?

      Ans: Period (T)= 5 seconds
    • What is the frequency of Figure A? Show solution
      Ans:
      f= 1/T
      =1/5 seconds
      = 0.2 Hz
    • The sound has a frequency of 426 Hz. What is the period?
      ans: 0.02 seconds
    • A hiker shouts toward a cliff. The returning echo has a frequency of 20.0Hz. Find the period.
      ans: 0.05 seconds
    • Speed: The speed or velocity of a wave is how fast the energy is moved.
    • Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids.
    • A wave has a frequency of 900Hz and a wavelength of 200m. At what
      speed is this wave travelling?
      Given:
      f = 900Hz
      lambda =200m

      Unknown:
      v=?

      Formula:
      v= flambda

      Solution:
      v= 900Hz * 200m
      v= 180,000m/s
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