Chapter 16 Homework Solutions
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PHY2053 – Chapter 16 Homework Solutions
Conceptual Questions: 2, 3, 4, 7, 11, 13, 15, 19
Problems: 3, 4, 9, 12, 13, 18, 49, 50, 60, 65, 70, 73
When a domino topples, the displacement of its center of mass has both horizontal and vertical components.
Therefore the wave has both longitudinal and transverse components.
We cannot draw the conclusion that one coil moves through a distance of 5 m, because the 5 m/s wave speed is
not the speed of the coil. The coil is in oscillation.
The particles of the string oscillate and have their accelerations may not be zero, even though the wave travels
at constant speed.
To catch up and pass the pulse in the first string, the pulse in the second string needs to travel at higher speed,
which can be achieved by increase the tension in the second string.
11. The speed of sound is faster in water than in air. Since the frequency of the sound wave remains unchanged
when the wave travels from the air into the water, the wavelength must increase according to