Senkov while driving his old 1996 Chevy Lumina approaches a police car on the side of the road. The Lumina was speeding at 55 m/s (123 mph) so the police car turns on its siren. If the frequency of the sound that the police car emits is 590 Hz, what frequency does Dr. Senkov hear (while approaching the cop car that is at rest)? The speed of sound is 337 m/s (it is pretty cold there). A. 607 Hz B. 635 Hz C. 658 Hz D. 671 Hz E. 686 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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