glitterfairy35681 glitterfairy35681

19-03-2024
Physics

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A man standing 48 m away from a wall fires a gun. Calculate the time after which an echo is heard. (The speed of sound in air is 320 ms⁻¹)
a. 0.30 s
b. 0.60 s
c. 0.50 s
d. 0.38 s

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