Two sound sources emit sound in phase with an unknown frequency f. One sound source is at the origin and the other is at 4.30mĵ. The speed of sound is 340 in air. An observer starts at F= 10.32mî + 2.15mĵ, a location of constructive interference. They walk in the direction and the next time they encounter constructive interference is at 7= 10.32mî. They then start to walk in the direction, so their position is zî. 4.3m Origin 10.32mi+2.15m 10.32m 18. What is the frequency of the sound sources? (a) 79Hz (b) 158/la
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.
The answers are D for #18 and C for #19 could someone please explain why this is and how to find it.
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