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Question 19M.1A.SL.TZ1.14

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.SL.TZ1.14
Level SL Paper 1A Time zone TZ1
Command term Question number 14 Adapted from N/A
14.
[Maximum mark: 1]
19M.1A.SL.TZ1.14

In an experiment to determine the speed of sound in air, a tube that is open at the top is filled with water and a vibrating tuning fork is held over the tube as the water is released through a valve.

An increase in intensity in the sound is heard for the first time when the air column length is x . The next increase is heard when the air column length is y .

Which expressions are approximately correct for the wavelength of the sound?

I. 4 x

II. 4 y

III.  4 y 3

A. I and II

B. I and III

C. II and III

D. I, II and III

[1]

Markscheme

B

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