A weather radar sends a pulse towards a rainstorm and detects the reflected pulse 220 μs220\ \mu\mathrm{s}220 μs after transmission. The pulse travels at 3.0 × 108 m/s. The reflecting part of the rainstorm then moves 6.0 km towards the radar. What is the expected echo time after this movement?
An echo time of 240 μs240\ \mu\mathrm{s}240 μs
An echo time of 260 μs260\ \mu\mathrm{s}260 μs
An echo time of 180 μs180\ \mu\mathrm{s}180 μs
An echo time of 200 μs200\ \mu\mathrm{s}200 μs
112 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties, covering 4.1.1 Waves transfer energy and information, 4.1.2 Frequency, wavelength, amplitude, period and wavefronts, 4.1.3 Longitudinal and transverse waves, 4.1.4 The wave speed equations, 4.1.5 Measuring wave velocity, and 4.1.6 Calculating depth or distance from waves. Each one has a worked solution and a mark scheme showing where the marks go.