A student records measurements of the same sound wave before and after it crosses a boundary.
The table shows the results.
| Medium | Speed in m/s\mathrm{m/s}m/s | Frequency in Hz\mathrm{Hz}Hz | Wavelength in m\mathrm{m}m |
|---|---|---|---|
| P | 300 | 500 | 0.60 |
| Q | 1200 | 2000 | 2.4 |
Only one entry is incorrect. Which correction should the student make?
Change the wavelength in Q to 0.60 m0.60\ \mathrm{m}0.60 m.
Change the speed in Q to 4800 m/s4800\ \mathrm{m/s}4800 m/s.
Change the frequency in P to 2000 Hz2000\ \mathrm{Hz}2000 Hz.
Change the frequency in Q to 500 Hz500\ \mathrm{Hz}500 Hz.
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.