A-LevelPhysicsForces, density and pressureMay/June 2016Paper 1 Q131 Mark
In a large container in an oil refinery, three oils of different densities are mixed. No chemical activity occurs. The mixture consists of 1200 kg of oil of density 1100kg m⁻³, 1500 kg of oil of density 860 kg m⁻³, 4000 kg of oil of density 910kgm⁻³. What is the density of the mixture?
A927 kg m⁻³
B957 kg m⁻³
C1010 kg m⁻³
D1080 kg m⁻³
✓ Correct Answer
The correct answer is A: 927 kg m⁻³
📋 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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