A physical science student stands in front of a tall vertical cliff to determine the speed of sound in air.
State the name of a piece of equipment suitable for measuring a distance of over 100 m100\text{ m}100 m along the ground.
Explain how sound forms an echo.
The student claps two wooden blocks together repeatedly once every 0.80 s0.80\text{ s}0.80 s. He walks away from the cliff until he hears the echo from one clap at the exact same instant as he makes the next clap. At this position, he is 136 m136\text{ m}136 m from the cliff.
Use this information to determine the speed of sound. State the unit.
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.