O-LevelPhysicsWavesOct/Nov 2025Paper 1 Q241 Mark
A firework is launched vertically from the ground. When the firework reaches a height of 360m, the firework explodes, producing coloured light. A student on the ground below the firework incorrectly measures the time between seeing the coloured light and hearing the explosion. The student obtains a value of 1.8 s. What is the speed of sound that the student's value suggests?
A200 m/s
B360 m/s
C400 m/s
D650 m/s
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of waves within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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