Professor Sophie Scott uses a tuning fork and a high speed camera to show what is physically happening when we hear sounds. Hitting the tuning fork causes all the air molecules around it to vibrate.

Try these interactive flashcards based on GCSE physics past papers. By working your way through the flashcards created by experts, you can prepare for your physics exams and make your revision more ...

THIS is frankly a revision course. It contains the information required by the examiners in a reasonably small compass, and should prove useful in any school in which the chief object of including ...