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Subjects
Science State Board
Class 8
Sound
Properties of sound and types of musical instruments
12.
Nature and types of sound
Exercise condition:
4
m.
Choose the correct answer
:
1
.
Dogs
can hear __________ sound
Ultrasound
Infrasound
.
2
.
The time period of a wave is reciprocal of__________
Amplitude
Frequency
.
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