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Question 19M.2.HL.TZ2.3di

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.2.HL.TZ2.3di
Level HL Paper 2 Time zone TZ2
Command term Draw Question number di Adapted from N/A
di.
[Maximum mark: 1]
19M.2.HL.TZ2.3di

The sound wave in air in (c) enters a pipe that is open at both ends. The diagram shows the displacement, at a particular time T, of the standing wave that is set up in the pipe.

A particular air molecule has its equilibrium position at the point labelled M.

(di)

On the diagram, at time T, draw an arrow to indicate the acceleration of this molecule.

[1]

Markscheme

horizontal arrow «at M» pointing left ✔

Examiners report

Very few candidates could interpret this situation and most arrows were shown in a vertical plane.

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