Two students are measuring the speed of sound in air using two wooden blocks, a stopwatch, and a long measuring tape. They decide to use a tall, vertical wall to produce an echo.
Describe how the students use this apparatus to measure the speed of sound and how they calculate its value.
A sound source submerged in a freshwater lake emits a sound wave with a frequency of 400 Hz.
The speed of sound in fresh water is 1480 m/s. Calculate the wavelength of this sound wave in the water.
The sound wave then travels upwards and passes from the fresh water into the surrounding air. State what happens, if anything, to:
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.