An ambulance traveling eastbound at 124.0 km/h with sirens blaring at frequency of 6.00 x 102 Hz passes cars traveling in both the eastbound and wesbound directions at 53.0 km/h. (Assume the speed of sound is 345 m/s.) (a) What is the frequency observed by the eastbound drivers as the ambulance approaches from behind? (b) What is the frequency observed by the eastbound drivers after the ambulance passes them? (c) What is the frequency observed by the westbound drivers as the ambulance approaches them? (d) What is the frequency observed by the westbound drivers after the ambulance passes them?
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.
An ambulance traveling eastbound at 124.0 km/h with sirens blaring at frequency of 6.00 x 102 Hz passes cars traveling in both the eastbound and wesbound directions at 53.0 km/h. (Assume the speed of sound is 345 m/s.)
(a) What is the frequency observed by the eastbound drivers as the ambulance approaches from behind?
(b) What is the frequency observed by the eastbound drivers after the ambulance passes them?
(c) What is the frequency observed by the westbound drivers as the ambulance approaches them?
(d) What is the frequency observed by the westbound drivers after the ambulance passes them?
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