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Class 9 Number Systems Important Questions

Number Systems Important Questions Find three rational number between and . Represent √ 6.4 on the number line. If x = and y = , find the value of x2 + y2 + xy. Express 6.234 in the form of p/q. If x = , find the value of . Find the smallest of the numbers , […]

Class 9 Sound Notes

Sound Notes Sound:- Sound is a form of energy which produces a sensation of hearing in our ears. Vibration:- A kind of rapid to and fro motion of an object is called vibration. Sound is produced by vibrating objects. Wave:- A wave is a disturbance that moves through a medium when the particles of medium […]