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A spring, such as that in (a), is stretched horizontally and a longitudinal travelling wave is set up in the spring, travelling to the right.

The graph shows how the displacement x of one coil C of the spring varies with time t.

The speed of the wave is $3.0 \mathrm{~cm} \mathrm{~s}^{-1}$ . Determine the wavelength of the wave.

frequency $=\left(\frac{1}{T}=\frac{1}{0.80}=\right) 1.25 \mathrm{~Hz}$ ;
wavelength $=\frac{v}{f}=\frac{3.0}{1.25}=2.4 \mathrm{~cm}$ or $2.4 \times 10^{-2} \mathrm{~m}$ ;

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IB Physics HL C 2 3 Nature of Sound Waves Topic Practice

Question 1