An experiment was carried out to investigate how the speed of transverse waves along a stretched elastic cord is affected by the tension in the cord. The results are shown in the graph below.
a.[1]
State the relationship shown by the graph between the tension in the cord and the speed of the wave.
b.[1]
Determine the speed of the wave when the tension is 8.0 N8.0\text{ N}8.0 N.
c.[3]
The frequency of the wave generator is 125 Hz125\text{ Hz}125 Hz. Calculate the wavelength of the wave when the tension is 8.0 N8.0\text{ N}8.0 N. Use the equation: wave speed=frequency×wavelength\text{wave speed} = \text{frequency} \times \text{wavelength}wave speed=frequency×wavelength