What causes a sound wave?
A stationary source.
A constant air pressure.
A vibrating source.
A moving observer.
Flashcards for Edexcel GCSE Physics Sound, ultrasound and infrasound, covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 31 cards, matched to the Edexcel GCSE Physics (1PH0) specification. Recall questions account for roughly 40% of marks at GCSE Physics, so these target the marks you can secure before the paper starts.
