A sound wave travels from a glass panel into glycerol. Measurements are shown in the table.
| Medium | Speed of sound (m/s\mathrm{m/s}m/s) | Wavelength (m\mathrm{m}m) |
|---|---|---|
| Glass panel | 4500 | — |
| Glycerol | 1900 | 7.6 |
Which option gives the class of the wave and its wavelength in the glass panel?
audible sound, 18 m18\ \mathrm{m}18 m
infrasound, 7.6 m7.6\ \mathrm{m}7.6 m
infrasound, 18 m18\ \mathrm{m}18 m
audible sound, 3.2 m3.2\ \mathrm{m}3.2 m
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.