1. Write an expression for a transverse harmonic wave that has a wavelength of 2.6 m and propagates to the right with a speed of 14.3 m/s. The amplitude of the wave is 0.11 m, and its displacement att= 0 and x= 0 is 0.11 m. 2. Consider a wave on a string with constant tension. If the frequency of the wave is doubled, by what multiplicative factor does (a) the speed and (b) the wavelength change?
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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Practice Question
1. Write an expression for a transverse harmonic wave that has a wavelength of 2.6 m and
propagates to the right with a speed of 14.3 m/s. The amplitude of the wave is 0.11 m, and
its displacement at t =0 and x= 0 is 0.11 m.
2. Consider a wave on a string with constant tension. If the frequency of the wave is doubled,
by what multiplicative factor does (a) the speed and (b) the wavelength change?
3. Three waves A, B and C propagate on strings with equal tensions and equal mass per
length. Rank the waves in order of increasing
Frequency
i)
ii) wavelength
speed
Indicate ties where appropriate.
4. A bother and a sister try to communicate with a string tied between two tin cans as shown
below. If the string is 9.5 m long, has a mass of 32g, and it is pulled taut with a tension of 8.6
N, how much time does it take for a wave to travel from one end of the string to the other?
9,5 m](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc6351d45-3fbf-4a39-a101-d4de2c6a4924%2F53d0b702-4324-45c9-8576-660a71409ab4%2Ftkgjocwh_processed.jpeg&w=3840&q=75)
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