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Question 19N.1.HL.TZ0.14

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.1.HL.TZ0.14
Level HL Paper 1 Time zone TZ0
Command term Question number 14 Adapted from N/A
14.
[Maximum mark: 1]
19N.1.HL.TZ0.14

A pipe of length 0.6 m is filled with a gas and closed at one end. The speed of sound in the gas is 300 m s–1. What are the frequencies of the first two harmonics in the tube?

A.  125 Hz and 250 Hz

B.  125 Hz and 375 Hz

C.  250 Hz and 500 Hz

D.  250 Hz and 750 Hz

[1]

Markscheme

B

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