A student has an ultrasound transceiver device that emits short pulses of ultrasound and detects their reflections.
The device measures the time interval, ttt (in microseconds, μs\mu\text{s}μs), between emitting a pulse and detecting the reflected pulse.
Describe how the student can use this device to determine the speed of ultrasound in a long block of granite.
35 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.