A man and a dog observe in the distance a loud nuclear explosion producing a sound having an effective power of 1.6 kW. The man does not hear the sound of the explosion while the dog can hear it. Knowing that humans can hear a sound from 0 dB and the dog can hear a sound from -6 dB, we want to estimate how far away the explosion is. We use the usual approximations and assume that the sound travels over the surface of a sphere. Keep in mind the speed of sound is 343 m/s. In between ? km and ? km do the man and the dog are from the explosion ?
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.
A man and a dog observe in the distance a loud nuclear explosion producing a sound having an effective power of 1.6 kW. The man does not hear the sound of the explosion while the dog can hear it. Knowing that humans can hear a sound from 0 dB and the dog can hear a sound from -6 dB, we want to estimate how far away the explosion is. We use the usual approximations and assume that the sound travels over the surface of a sphere. Keep in mind the speed of sound is 343 m/s.
In between ? km and ? km do the man and the dog are from the explosion ?
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