A transverse pulse is propagating in a stretched string and represented at t = 0 by the wave form: y(x) = 3.00 e-x² x and y are in meter. The pulse propagates in the positive x-direction with a speed of 2.50 m/s. (a) Write the corresponding wave function describing the displacement y(x, t) of an element of the string as function of its position x and time t. (b) Plot approximately the pulse at t = 0 and t = 2.00s on the same graph (x, y). (c) Plot approximately the displacement y of a point located at x = +5.00 m as a function of time t in a graph (t, y).
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.
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