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Physics · 2000 · November · Paper 3 · HL · Markscheme

PhysicsMarkscheme2000HLNovember

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Resource overview

This markscheme is listed under Physics in the 2000 examination archive. Its catalogue level is HL. The catalogue session is November. The information below helps you identify the document before opening the complete PDF. Subject, year and session labels come from the archive catalogue; the original cover remains the reference if a label differs. A file is not automatically suitable for your current syllabus simply because its subject name matches.

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MARKSCHEME November 2000 PHYSICS Higher Level Paper 3 N00/430/H(3)M INTERNATIONAL BACCALAUREATE BACCALAURÉAT INTERNATIONAL BACHILLERATO INTERNACIONAL 28 pages [1] [1] D1. (a) Maximum velocity at centre, Symmetrically decreasing towards zero velocity at the walls. (Accept answers that do not emphasise that the velocity is zero at the walls so long as the velocity shown nearest the wall is less than half the velocity in the centre.) Artery wall Artery wall Centre line Direction of blood flow [1](b) Any plausible reason, e.g. fatty deposits/hypertension. ( Reject answers in terms of exercise unless the assumption that the artery is connected to the digestive system is clearly stated.) [1] (c) If radius increases, area is increased, therefore more space for fluid to flow / area is proportional to . 2(radius) [1]Volume flow rate = area × average blood velocity. [1] Both effects lead to increased flow rate and both are proportional to so 2(radius) overall, volume flow rate is proportional to . 4(radius) [1](d) Attempted use of flow rate ∝ . 4(radius) [1] New flow rate old flow rate 4(0.95)=× / 81 % of old flow rate / 19 % decrease.0.81= (Accept any method of stating the above answer. Accept statement that if r goes down by 5 % then goes down by 20 %.) 4r – 6 – N00/430/H(3)M
File information
Subject
Physics
Document type
Markscheme
Year
2000
Session
November
Level
HL
Paper
3
Examination zone
Not labelled in the archive
Language
Not labelled in the archive
File size
113 KB
Pages
24
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