Consider a wave traveling down a cord and the transversemotion of a small piece of the cord. Which of the followingis true?(a) The speed of the wave must be the same as the speedof a small piece of the cord.(b) The frequency of the wave must be the same as thefrequency of a small piece of the cord.(c) The amplitude of the wave must be the same as theamplitude of a small piece of the cord.(d) All of the above are true.(e) Both (b) and (c) are true.
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Consider a wave traveling down a cord and the transverse
motion of a small piece of the cord. Which of the following
is true?
(a) The speed of the wave must be the same as the speed
of a small piece of the cord.
(b) The frequency of the wave must be the same as the
frequency of a small piece of the cord.
(c) The amplitude of the wave must be the same as the
amplitude of a small piece of the cord.
(d) All of the above are true.
(e) Both (b) and (c) are true.
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