EASY
8th CBSE
IMPORTANT
Earn 100

1 Hz means one vibration per second.

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Important Questions on Sound

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.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q E
Curtains, cushions and rugs in a room absorb sound.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q F
What are vibrations?
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 13 - Sound>Exercises>Q F
Define the following.
Frequency of the vibration