18. Waves & Sound

Which of the following factors can cause the amplitude of a wave to change?

In the context of wave functions, how does increasing the energy of a wave affect its amplitude?

FIGURE P16.57 shows a snapshot graph of a wave traveling to the right along a string at 45 m/s. At this instant, what is the velocity of points 1, 2, and 3 on the string?

The period of a waveform is defined as the time it takes for one complete cycle to occur. If the waveform shown in Figure 1c repeats every $0.02$ seconds, what is its period?

Consider the point x = 1.00 m on the cord of Example 15–6. Determine the maximum acceleration of this point.

Which of the following statements about wave functions is true?

Which of the following best describes the frequency $f$ of a wave?

In the wave function $y=Asin(kx-\omega t)$, which symbol represents the amplitude of the wave?

In the context of wave functions $\psi$ and quantum mechanics, coherent scattering is also called:

A wave function is shown with a constant amplitude and a sinusoidal shape that repeats at regular intervals along the $x$-axis. Which best describes the type of wave seen here?

Which of the following best describes the medium through which seismic waves travel?

In the context of wave functions, what does the speed $v$ of a wave only depend on?

A transverse harmonic wave moving to the left has a wavelength of 2.5 m and a wave speed of 12 m/s. The amplitude of the wave is 0.1 m. At x = 0 and t = 0, the displacement of the wave is y = 0. Write the wave function for this wave.

(I) A transverse wave on a wire is given by D (x, t) = 0.015 sin (35x - 1200 t) where D and x are in meters and t is in seconds. Write an expression for a wave with the same amplitude, wavelength, and frequency but traveling in the opposite direction.