wave speed

• What is the purpose of a ripple tank?

  To observe features of water waves
• What equipment is used in a ripple tank?

  A shallow tray of water and a vibrating bar
• How is the vibrating bar powered in a ripple tank?

  It is connected to a power pack
• How are waves visualized in a ripple tank?

  By shining light through the water onto paper
• What is the first step to measure the wavelength in a ripple tank?

  Place a ruler on the paper
• How do you calculate one wavelength from ten wavelengths?

  Divide the total distance by 10
• How is frequency defined in the context of waves?

  Number of waves passing a point each second
• How do you find the frequency more accurately?

  Count waves in 10 seconds, then divide by 10
• How is wave speed determined using wavelength and frequency?

  Wave speed = frequency × wavelength
• What is another method to determine wave speed?

  Measure time for a wave to travel the tank
• Why might results differ between methods of measuring wave speed?

  Due to measurement errors in time
• What should you be able to describe by the end of the video?

  How to measure wavelength, frequency, and speed
• What apparatus is used to measure waves in a solid?

  A string attached to a vibration generator
• What keeps the string taut in the apparatus?

  A hanging mass
• What does the signal generator do in the setup?

  It changes the frequency of vibration
• What is a standing wave?

  A wave pattern formed by resonance
• In which instruments do we find standing waves?

  Stringed musical instruments like guitars
• How do you measure the wavelength of a standing wave?

  Using a ruler to measure total length
• What is the wave equation used to calculate wave speed?

  Wave speed = frequency × 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?

  It 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 3 half wavelengths, what is the wavelength?


  $0.143 \text{ m}$
• If the frequency used to create the wave is 15 Hertz, what is the wave speed?

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

  Tautness of the string and mass per centimeter
• What is the formula to calculate the wavelength from the total length and half wavelengths?

  Wavelength = (Total length / Half wavelengths) × 2
• What are the steps to calculate the wave speed in the experiment?

  1. Measure the total length of the standing wave.
  2. Read the frequency from the signal generator.
  3. Use the wave equation: Wave speed = frequency × wavelength.
• What are the key concepts related to standing waves in this practical?

  • Standing waves form due to resonance.
  • Wavelength can be calculated from total length and half wavelengths.
  • Wave speed is independent of frequency and wavelength.