O-LevelPhysicsWaves5054/22 · May/June 2017 · Q65 Marks
Explain the difference between a longitudinal wave and a transverse wave. You may draw a diagram, if you wish, to help your explanation.
- (a)Explain the difference between a longitudinal wave and a transverse wave. You may draw a diagram, if you wish, to help your explanation.[2]
- (b)(i)A sound wave has a frequency of 3.8 kHz and a speed of 330 m/s. Calculate the wavelength of the sound.[2]
- (b)(ii)A different sound has a frequency of 3.8 Hz. State and explain whether a human with normal hearing is able to hear this sound.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.
- [1] longitudinal - vibration / oscillation / movement to and fro and in direction of wave or has compressions and rarefactions
- [1] transverse - vibration / oscillation / movement up and down and at right angles to wave or has crests and troughs
- [1] (λ = ) v / f or 330 / 3800
- [1] 0.087 m or 8.7 cm
- [1] not heard and because below the range of audible frequencies or audible range is 20 – 20 000 Hz or too low a pitch / frequency
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