A convertible with the top down is traveling north on a road at a speed of 27.0 m/s. A fire truck, traveling south at a speed of 45.0 m/s, approaches with its siren producing sound at a frequency of 2450 Hz. (Enter your answers in Hz. Assume that the speed of sound in air is 343 m/s.) (a) What frequency does the driver of the convertible observe as the fire truck approaches? (Enter your answer to the nearest integer.) Hz (b) What frequency does the driver of the convertible detect after the fire truck passes her? Hz (c) Repeat parts (a) and (b) for the case when the fire truck is traveling northbound. while fire truck overtakes Hz after fire truck passes Hz
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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