How will you get your speed from frequency and wavelength? (speed of a wave = wavelength in meters x frequency in hertz). Write down your frequency, wavelength and speed. You are going to do this several times so how should you organize your data? Increase the frequency - note, people really mess this up. You actually have to get it vibrating back and forth FASTER, not bigger, FASTER. More times per second. (see the images below, 3rd image, 2nd row has 2 humps (antinodes) virbrating back and forth. This is what you want