A wave travelling through a material has a frequency of 50 Hz and a wavelength of 0.40 m. How long does it take the wave to travel 100 m through this material?
velocity = frequency x wavelengthvelocity = 50 * 0.40velocity = 20 m/svelocity = distance / timetime = distance / velocitytime = 100 / 20time = 5sAnswer is 5s.