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CBSE Class 9 Answered

Question 3.
 
 
Asked by gpnkumar0 | 13 Mar, 2017, 05:04: PM
answered-by-expert Expert Answer
Kindly refer the link for the answer of (a) and (c):
 
http://www.topperlearning.com/forums/ask-experts-19/the-sound-of-an-explosion-on-the-surface-of-the-lake-is-hear-physics-propagation-of-sound-waves-speed-of-sound-95567/reply
 
(b) Audible range of human ear is roughly 20 Hz - 20 kHz
Answered by Yashvanti Jain | 14 Mar, 2017, 11:48: AM

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