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Ch 15: Mechanical Waves
Young & Freedman Calc - University Physics 14th Edition
Young & Freedman Calc14th EditionUniversity PhysicsISBN: 9780321973610당신이 사용하는 게 아니라요?교과서 변경
15장, 문제 42d

The wave function of a standing wave is y(x,t)=4.44 mmsin[(32.5 rad/m)x]sin[(754rad/s)t]y(x,t)=4.44\(\text{ mm}\]\sin\)[(32.5\(\text{ rad/m}\))x]\(\sin\)[(754\(\text{rad/s}\))t]. For the two traveling waves that make up this standing wave, find the wave speed.

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1
Understand that a standing wave is formed by the superposition of two traveling waves moving in opposite directions. The given wave function is y(x, t) = 4.44 mm sin[(32.5 rad/m)x] sin[(754 rad/s)t].
Identify the wave number (k) and angular frequency (ω) from the wave function. Here, k = 32.5 rad/m and ω = 754 rad/s.
Recall the relationship between wave speed (v), wave number (k), and angular frequency (ω). The wave speed v is given by the formula: v = ω / k.
Substitute the values of ω and k into the formula: v = 754 rad/s / 32.5 rad/m.
Perform the division to find the wave speed, ensuring units are consistent to obtain the speed in meters per second (m/s).

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Standing Waves

Standing waves are formed by the superposition of two traveling waves moving in opposite directions with the same frequency and amplitude. They are characterized by nodes, where the wave amplitude is zero, and antinodes, where the amplitude is maximum. Understanding the formation and properties of standing waves is crucial for analyzing the given wave function.
추천 영상:
가이드 코스
07:58
Intro to Transverse Standing Waves

Wave Function

The wave function describes the displacement of a wave at any point in space and time. In the given problem, the wave function y(x, t) = 4.44 mm sin[(32.5 rad/m)x] sin[(754 rad/s)t] represents a standing wave, where the spatial and temporal components are separated, indicating the wave's behavior in space and time. This separation helps identify the characteristics of the traveling waves involved.
추천 영상:
가이드 코스
08:30
Intro to Wave Functions

Wave Speed

Wave speed is the rate at which a wave propagates through a medium, calculated as the product of frequency and wavelength. For traveling waves forming a standing wave, the wave speed can be determined using the angular frequency (ω = 754 rad/s) and the wave number (k = 32.5 rad/m) from the wave function. The formula v = ω/k provides the wave speed, essential for solving the problem.
추천 영상:
가이드 코스
07:19
Intro to Waves and Wave Speed
관련 실천
교과서 질문

A horizontal string tied at both ends is vibrating in its fundamental mode. The traveling waves have speed vv, frequency ff, amplitude AA, and wavelength λ\(\lambda\). Calculate the maximum transverse velocity and maximum transverse acceleration of points located at (i) x=λ/2x = λ/2, (ii) x=λ/4x = λ/4, and (iii) x=λ/8x = λ/8, from the left-hand end of the string.

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교과서 질문

The wave function of a standing wave is y(x,t)=4.44 mmsin[(32.5 rad/m)x]sin[(754rad/s)t]y(x,t)=4.44\(\text{ mm}\]\sin\)[(32.5\(\text{ rad/m}\))x]\(\sin\)[(754\(\text{rad/s}\))t]. For the two traveling waves that make up this standing wave, find the frequency.

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교과서 질문

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교과서 질문

The wave function of a standing wave is y(x,t)=4.44 mmsin[(32.5 rad/m)x]sin[(754rad/s)t]y(x,t)=4.44\(\text{ mm}\]\sin\)[(32.5\(\text{ rad/m}\))x]\(\sin\)[(754\(\text{rad/s}\))t]. For the two traveling waves that make up this standing wave, find the wavelength.

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교과서 질문

The wave function of a standing wave is y(x,t)=4.44 mmsin[(32.5 rad/m)x]sin[(754rad/s)t]y(x,t)=4.44\(\text{ mm}\]\sin\)[(32.5\(\text{ rad/m}\))x]\(\sin\)[(754\(\text{rad/s}\))t]. For the two traveling waves that make up this standing wave, find the amplitude.

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교과서 질문

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