EASY
8th CBSE
IMPORTANT
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Choose the odd one out.

harmonium, flute, nadaswaram, violin

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Important Questions on Sound

EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q D
Choose the odd one out.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
Sound can be produced by beating an object irrespective of whether there are vibrations or not.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
1 Hz means one vibration per second.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
A short flute will produce the sound of lower pitch than a long flute.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
Human speech is possible due to the passage of air through the oesophagus.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
The absorption and slow release of sound waves by surfaces cause echoes.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
Sound of frequency above 20,000 Hz is called ultrasonic sound.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
Excessive noise can cause deafness.