IB Physics-Theme C-Qc#12-Paper 2-Phase difference- Standing waves

A longitudinal wave travels in a medium with speed 340 m s . The graph shows the variation with time t of the displacement x of a particle P in the medium. Positive displacements on the graph correspond to displacements to the right for particle P.
a. Calculate the wavelength of the wave.
Another wave travels in the medium. The graph shows the variation with time t of the displacement of each wave at the position of P.
b. State the phase difference between the two waves.
c. Identify a time at which the displacement of P is zero.
d. Estimate the amplitude of the resultant wave.
A standing sound wave is established in a tube that is closed at one end and open at the other end. The period of the wave is . The diagram represents the
standing wave at and at . The wavelength of the wave is 1.20 m.
Positive displacements mean displacements to the right.
e. A standing sound wave is established in a tube that is closed at one end and open at the other end. The period of the wave is . The diagram represents the standing wave at and at . The wavelength of the wave is 1.20 m. Positive displacements mean displacements to the right.
Calculate the length of the tube.


f. A particle in the tube has its equilibrium position at the open end of the
tube. State and explain the direction of the velocity of this particle at time .
Topic 4 and topic 9 Oscillations and waves playlist:

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Note:@ 13 min, a time at which the displacement of P is zero is 1.5 sec