IB Physics SL C.2.3 Wave equation

Apply the wave equation to calculate speed, frequency, wavelength or period from graphs, resonance geometry and sound data.

Exam points

use v = f lambda or v = lambda/T after extracting two quantities from a graph or data table
combine resonance lengths with unchanged frequency to calculate wave speed in another medium
keep units consistent and give the final speed to appropriate significant figures

[Maximum number: 1]

This question is in two parts. Part 1 is about a thermistor circuit. Part 2 is about vibrations and waves.
Part 1 Thermistor circuit
The circuit shows a negative temperature coefficient (NTC) thermistor X and a $100 \mathrm{k} \Omega$ fixed resistor R connected across a battery.

Figure for Question C.2.3—Wave equation question 1 — IB Physics SL

The battery has an electromotive force (emf) of 12.0 V and negligible internal resistance.

The sound waves from the loudspeaker travel in air with speed $330 \mathrm{~m} \mathrm{~s}^{-1}$ .

Calculate the wavelength of the sound waves.

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C.2.3—Wave equation question 1