Seismic waves from the epicentre of an earthquake take 120 s to reach a seismograph station located 420 km away. When they arrive, they cause the ground to vibrate with a frequency of 2.5 Hz.
What is the wavelength of these seismic waves?
0.71 km0.71\text{ km}0.71 km
1.4 km1.4\text{ km}1.4 km
3.5 km3.5\text{ km}3.5 km
8.8 km8.8\text{ km}8.8 km
237 exam-style questions on CIE IGCSE Physics General properties of waves, covering General properties of waves. Each one has a worked solution and a mark scheme showing where the marks go.