A remotely operated vehicle uses ultrasound pulses to inspect a bridge support. The support is 84 m from the transmitter. The speed of ultrasound in the water is 1470 m/s.
The transmitter sends the next pulse only after the echo has returned and the computer has processed the signal. Processing takes 0.025 s.
Calculate the greatest rate at which the transmitter can send pulses.
112 exam-style questions on Edexcel GCSE Physics 4.3 Sound, ultrasound and infrasound, covering 4.3.1 Sound waves, vibrations and the human ear, 4.3.2 Ultrasound and infrasound, 4.3.3 Uses of ultrasound and infrasound, and 4.3.4 Sound waves passing between media. Each one has a worked solution and a mark scheme showing where the marks go.