On a bright winter's day, a sports fan notices an echo as he jogs between a high school's playing field and the rear wall of its parking structure. He decides He abruptly shouts and determines that the sound pulse returns to his as an echo 0.400 seconds later (averaging several trials for enhanced reliability). The air is a frigid -10°C. estimate how far he stands from the reflective wall. Six months later, the sports fan decides to repeat his experiment on a hot summer day, standing at the same exact spot. This time, the echo takes a slightly shorter 0.368 seconds to return to the sports fan. (a) What is the temperature (in °C) of the air on the summer day? °C (b) How far (in m) does the sports fan stand from the reflective wall?
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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