Sound Waves and Noise MCQ App Download - Grade 7 Science PDF e-Book
Class 7 Science Online Tests
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The MCQ: Sound is measured by units that are called "Sound Waves and Noise" App Download [Free] with answers: hertz (hz), decibels (db), meters (m), and pascal (pa) to learn online classes courses. Solve Sound Waves Quiz Questions, download Apple e-Book (Free Sample) for elementary school graduation certificate.
Sound is measured by units that are called
20 dB has hundred times more energy than
'Eardrum' bursts at
The level of sound of normal conversation is
Loud noise can
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