A-LevelPhysicsNuclear physicsMay/June 2017Paper 1 Q381 Mark
In a television programme to illustrate scientific models, a presenter fires a gun many times at a bale of hay. Two small cannon balls are embedded within the hay some distance apart from each other. The hay bale measures approximately 2m x 2m x 2m and the cannon balls are made of iron, approximately spherical, and about 5cm in diameter. What might the presenter be illustrating?
Aα-particle scattering
Bβ⁻ decay
Cconservation of momentum
Ddouble-slit interference
✓ Correct Answer
The correct answer is A: α-particle scattering
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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