Req Pratical 8: Waves in a Solid

• What is the purpose of the vibration generator in the experiment?

  To change the frequency of vibration of the string
• What is the wave equation used to calculate wave speed?

  Wave speed equals frequency multiplied by wavelength
• If the frequency is 10 Hertz and the wavelength is $0.215 \text{ m}$, what is the wave speed?


  $2.15 \text{ m/s}$
• What happens to the standing wave when the frequency is increased?

  The standing wave changes to have more half wavelengths
• How do you calculate the wavelength from the total length and number of half wavelengths?

  Divide total length by half wavelengths, then multiply by 2
• If the total length is $0.215 \text{ m}$ and there are three half wavelengths, what is the wavelength?


  $0.143 \text{ m}$
• How do you calculate the wave speed with a frequency of 15 Hertz and a wavelength of $0.143 \text{ m}$?


  $2.15 \text{ m/s}$
• What does the wave speed depend on in the string experiment?

  On the tautness of the string and mass per centimeter
• What is the process to calculate the wavelength from a standing wave?

  • Measure total length of the standing wave
  • Count the number of half wavelengths
  • Divide total length by the number of half wavelengths
  • Multiply the result by 2