A-LevelPhysicsWaves9702/12 · May/June 2014 · Q231 Mark
A sound wave consists of a series of moving pressure variations from the normal, constant air pressure. The graph shows these pressure variations for two waves at one instant in time. [Figure 23.1] Wave 1 has an intensity of 1.6 × 10⁻⁶ W m⁻². What is the intensity of wave 2?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A2.4 × 10⁻⁶ W m⁻²
B3.0 × 10⁻⁶ W m⁻²
C3.6 × 10⁻⁶ W m⁻²
D4.5 × 10⁻⁶ W m⁻²
✓ Correct answer
C: 3.6 × 10⁻⁶ W m⁻²
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