A sound wave has a wavelength of 0.012 m in air, where its speed is 336 m/s. It enters water, where its speed increases.
Which describes the sound in water?
It is ultrasound, with a shorter wavelength.
It is audible sound, with a longer wavelength.
It is audible sound, with a shorter wavelength.
It is ultrasound, with a longer wavelength.
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.