7.1 The diagram below shows different points on a longitudinal wave.
7.1.1 Write down the labels for A, B and C. (3)
7.1.2 Does this type of wave require a medium to propagate?
Write down: YES or NO (1)
7.2 The diagram shows TWO sound waves measured for the same time interval.
7.2.1 Which ONE of the sound waves has a HIGHER pitch? Explain the
answer. (3)
7.2.2 Which ONE of the sound waves (A or B), is LOUDER? (1)