An ambulance is rushing towards a bicycle rider. The ambulance is moving with a speed of 50.0 m/s and is emitting a sound that has a frequency of 250.0 Hz. Consider the speed of sound to be 340.0 m/s. Answer using three significant figures. a) If the bicycle rider is standing still, what will be the frequency of the sound she hears? b) Find the frequency of the sound if the bicycle rider is riding towards the ambulance at 10 m/s. c) Find the frequency of the sound if the bicycle rider is riding away from the ambulance at 10 m/s. d) What is the frequency heard by the bicycle rider if the rider is movin away from the ambulance at 50 m/s?
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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