A-LevelPhysicsForces, density and pressureMay/June 2016Paper 1 Q151 Mark
The density of air on the Earth decreases almost linearly with height from 1.22kg m⁻³ at sea level to 0.74 kg m⁻³ at an altitude of 5000 m. Atmospheric pressure at the Earth's surface on a particular day is 100000 Pa. The value of g between the Earth's surface and an altitude of 5000 m can be considered to have a constant value of 9.7 ms⁻². What will be the atmospheric pressure at an altitude of 5000 m?
A36 000 Pa
B48 000 Pa
C52 000 Pa
D59 000 Pa
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The correct answer is C. This question tests the candidate's understanding of forces, density and pressure within the Physicssyllabus. The examiner's mark scheme requires...
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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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