Environmental Sciences, asked by fauziyashaikh404fs, 18 days ago

Q.2 (A). Match the following: 'A' BY 1. Echo a. 20 Hz - 2000 Hz 2. Audible Frequency b. Repetition of original sound. c. Focal length is negative. ​

Answers

Answered by rr3479112
0

Explanation:

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