Ripples are generated in a shallow tray of water to model waves.
State the type of wave modelled by the ripples.
Describe how the water molecules move as the wave travels across the tray.
15 ripples hit the side of the tray in 12 seconds. Calculate the frequency of the ripples. Frequency = ____________ Hz
Student A and Student B investigate the wave speed of these ripples.
Student A measures the frequency and wavelength of the water ripples. Table 1 shows his results:
| Parameter | Value |
|---|---|
| Frequency of ripples (Hz) | 1.5 |
| Wavelength of ripples (m) | 0.08 |
Table 1
Calculate the wave speed of the ripples. Use the equation: wave speed=frequency×wavelength\text{wave speed} = \text{frequency} \times \text{wavelength}wave speed=frequency×wavelength Wave speed = ____________ m/s
Student B measures the same ripples as student A. She measures:
Table 2 shows student B's results:
| Measurement | Value |
|---|---|
| Distance ripple travels (m) | 1.80 |
| Time taken (s) | 12.0 |
Table 2
Name the equipment student B uses to measure the distance and time.
Use the results in Table 2 to calculate the wave speed of the ripples. Wave speed = ____________ m/s
Student A and student B obtained different answers for the wave speed of the ripples. Suggest why.