An observer stands 170 m away from a starter's pistol which produces a puff of smoke and a loud sound. The observer sees the smoke virtually instantaneously. The speed of sound in air is 340 m/s.
What is the time delay between the observer seeing the smoke and hearing the sound?
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.