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Question 18M.3.HL.TZ2.b.ii

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.HL.TZ2.b.ii
Level HL Paper 3 Time zone TZ2
Command term Outline Question number b.ii Adapted from N/A
b.ii.
[Maximum mark: 1]
18M.3.HL.TZ2.b.ii

Two tubes, A and B, are inserted into a fluid flowing through a horizontal pipe of diameter 0.50 m. The openings X and Y of the tubes are at the exact centre of the pipe. The liquid rises to a height of 0.10 m in tube A and 0.32 m in tube B. The density of the fluid = 1.0 × 103 kg m–3.

M18/4/PHYSI/HP3/ENG/TZ2/10

The viscosity of water is 8.9 × 10–4 Pa s.

Outline whether your answer to (a) is valid.

[1]

Markscheme

(R > 1000) flow is not laminar, so assumption is invalid

 

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[1 mark]

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