A long, straight steel pipe in a factory has a length of 450 m. A worker taps one end of the pipe with a hammer. At the other end, another worker listens with their ear pressed against the pipe.
State an approximate value for the speed of sound in air.
Sound travels at 5000 m/s in steel. Calculate the time it takes for the sound to travel along the steel pipe.
The worker at the far end hears two distinct sounds from the hammer strike, separated by a short time interval. Explain why there are two sounds.
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.