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Subjects
Science State Board
Class 9
Sound
Types, properties and applications of sound
7.
Riddles on sound waves
Exercise condition:
4
m.
Fill the blanks using the given options
:
Compression
Amplitude
Rarefaction
Ultrasound
Thrust
Oil
SONAR
Cochlea
ECG
1)
I can break kidney stones into fine grains. Who am I?
2)
It can convert the sound variation produced by the heart into electric signals. The word 'It' refers to?
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