Next, explore how changing the damping force might affect wave speed.

Keep the settings "Oscillate" and "No End".
Set the amplitude to 1.00 cm, frequency to 1.50 Hz, and tension to "High".
Turn on the rulers and timer and choose "Slow Motion".
Start with the damping slider at "None".
Use the ruler to measure the distance between the oscillator and the end of the string. (Pause the wave to make this easier.)
Time how long it takes a wave to travel the full length of the string. Start the timer when the green dot reaches the maximum amplitude at the oscillator and stop the timer when the wave reaches the maximum amplitude at far end of the string. Record the time.
Move the damping slider up for each recording, then measure and record the time it takes the wave to travel the full length of the string each round.
Calculate the velocity of the wave for each reading using the distance between the oscillator and the end of the string and the time recorded.