DP Physics (last assessment 2024)

Question 18N.3.HL.TZ0.b.i

Date	November 2018	Marks available	[Maximum mark: 2]	Reference code	18N.3.HL.TZ0.b.i
Level	HL	Paper	3	Time zone	TZ0
Command term	Outline	Question number	b.i	Adapted from	N/A

b.i.

[Maximum mark: 2]

18N.3.HL.TZ0.b.i

A horizontal pipe is inserted into the cylindrical tube so that its centre is at a depth of 5.0 m from the surface of the water. The diameter D of the pipe is half that of the tube.

When the pipe is opened, water exits the pipe with speed u and the surface of the water in the tube moves downwards with speed v.

Outline why u = 4v.

[2]

Markscheme

continuity equation says v × A₁ = u × A₂ ✔

«and» A₁ = 4A₂ ✔

«giving result»

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Option B: Engineering physics

Option B: Engineering physics » Option B: Engineering physics (Additional higher level option topics) » B.3 – Fluids and fluid dynamics (HL only)

Option B: Engineering physics » Option B: Engineering physics (Additional higher level option topics)

Question 18N.3.HL.TZ0.b.i

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