Define sound?

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vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium
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Malayalam ,maths,science tutor

Vibrations that travel through air or another medium and can be heard when they they reach a person's or animal's ear
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Tutor

vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear is called sound.
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vibrations that travel through the air or another medium and that can be heard when they reach a individual's ear.
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Physics Subject Expert

sound is a vibration that propagates as a typically mechanical wave of pressure and displacement, through a medium. There are audible and inaudible( infrasonic and ultrasonic) sound.
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B.Tech (IIT)

Sound is a form of energy which propagates in the form of wave and when perceived by our ear creates the sensation of hearing.
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Home Tutor

It is the waves moving in the air
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Home Tutor

It is the waves passing through the air....
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sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water.
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Tutor

In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water. In physiology and psychology, sound is the reception of such waves and their perception by the brain
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Subodh Kumar
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Let, three numbers are (a-d), a, (a+d) So, (a-d)+a+(a+d)=21 => a=7 Again, (7-d)×7×(7+d)=231 => (7-d)×(7+d)=231÷7 => 7^2 - d^2 = 33=> d^2 = 49 - 33=> d^2 = 16=> d = 4 So, the numbers are 7-4= 3, 7 and 7+4=11
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Laxmi
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