CBSE Class 9 - Sound - Fill up

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Q1. A sound of single frequency ___________.

Q2. A sound produced due to mixture of several frequency is called ___________.

Q3. A region of compressed air is knwon as ___________.

Q4. A form of energy which is emitted by a vibrating sorce is called ___________.

Q5. SI unit of frequency is ___________.

Q6. Distance travelled by a sound wave in its periodic time is ___________.

Q7. The hump in a medium through which a transerverse wave is passing called as ___________.

Q8. The phenomena of repetation of sound of a source by refleting from an obstacle is called ___________.

Q9. The loudness of sound depends on ___________.

Q10. When sound wave goes from one medium to another medium, ___________ remains unchanged.