Class 7 Science MCQs – Certification Test 210

Sound Waves and Noise MCQs (Question 210) – App & e-Book Download

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MCQ 210: 20 dB has hundred times more energy than:

10 dB
0 dB
5 dB
2 dB

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The App: Sound Waves and Noise MCQs App to learn Sound Waves and Noise Notes, 7th Grade Science MCQs App, and Earth Science MCQs App. The "Sound Waves and Noise MCQs" App Download – Free 7th Grade Science App (iOS & Android) for online certificate courses. Download App Store & Play Store Learning Apps with all functionalities for free online classes.