Physics (AS & A Level) · May / June 2016 · Paper 22 · Question 2
9702
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2(a)[3]
p = F / A use of m = ρV and use of V = Ah and use of F = mg correct substitution to obtain p = ρgh [3]
2(b)(i)[1]
(when h is zero the pressure is not zero due to) pressure from the air/atmosphere [1]
2(b)(ii)[2]
gradient = ρg or P – 1.0 × 105 = ρgh e.g. ρg = 1.0 × 105 / 0.75 (= 133333) ρ = 133 333 / 9.81 = 14 000 (13 592) kg m–3 [2]
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