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.
![18) A wire with a current of 2.8A is at an angle of 36
degrees relative to a magnetic field of 0.88 T. Find the
force exerted on a 2.25 m length of wire?
19) Waves on a particular string travel with a speed of
16 m/s. By what factor should the tension in the string
be changed to produce waves with a speed of 32 m/s?
20) The intensity level of sound of a truck is 92 deci-
bels. What is the intensity of this sound? Io:
10-12
21) A train moving with a speed of 32 m/s sounds a
140 Hz horn. What frequency is heard by an observer
standing near the tracks as the train approached?
22) Two sources emit waves that are in phase with each
other. What is the longest wavelength that will give
constructive interference at an observation point of 161
m from one source and 295 m from another source?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc14b7619-7f42-456d-bd15-e2d5f2d4f203%2F52bd57b9-4f2e-4837-a103-52f7702f8913%2Ff42iecl_processed.jpeg&w=3840&q=75)
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