The nodes of a standing wave are points where the displacement of the wave is zero at all times. Nodes are important for matching boundary conditions, for example that the point at which a string is tied to a support has zero displacement at all times (i.e., the point of attachment does not move). Consider a standing wave, where y represents the transverse displacement of a string that extends along the x direction. Here is a common mathematical form for such a wave: y(x, t) = A cos(kx) sin(wt), where A is the maximum transverse displacement of the string (the amplitude of the wave), which is assumed to be nonzero, k is the wavenumber, w is the angular frequency of the wave, and t is time.

The nodes of a standing wave are points where the displacement of the wave is zero at all times. Nodes are important for matching boundary conditions, for example that the point at which a string is tied to a support has zero displacement at all times (i.e., the point of attachment does not move). Consider a standing wave, where y represents the transverse displacement of a string that extends along the x direction. Here is a common mathematical form for such a wave: y(x, t) = A cos(kx) sin(wt), where A is the maximum transverse displacement of the string (the amplitude of the wave), which is assumed to be nonzero, k is the wavenumber, w is the angular frequency of the wave, and t is time.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter16: Waves

Section: Chapter Questions

Problem 91P: Consider two sinusoidal sine waves traveling along a string, modeled as y1(x,t)=0.3msin(4m1x+3s1t+3)...

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Concept explainers

Equation of Waves

Wave is an oscillation or disturbance traveling in a medium. It performs the transportation of energy but does not carry any matter. This motion of waves will transport fuel in a medium without permanent transfer of mass (particle).

Question

100%

• What is the displacement of the string as a function of x at time T/4, where T is the period of oscillation of the
string?
• At which three points X₁, X2, and x3 closest to x = 0 but with x > 0 will the displacement of the string y (x, t) be
zero for all times? These are the first three nodal points.

The nodes of a standing wave are points where the displacement of the wave is zero at all
times. Nodes are important for matching boundary conditions, for example that the point at
which a string is tied to a support has zero displacement at all times (i.e., the point of
attachment does not move).
Consider a standing wave, where y represents the transverse displacement of a string that
extends along the x direction. Here is a common mathematical form for such a wave:
y(x, t) = A cos(kx) sin(wt),
where A is the maximum transverse displacement of the string (the amplitude of the
wave), which is assumed to be nonzero, k is the wavenumber, w is the angular frequency
of the wave, and t is time.

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