To hear a distinct echo, the time interval between the original and percussion…
PYQ SSC JE (Junior Engineer) 2018
To hear a distinct echo, the time interval between the original and percussion sound must be at least _____.
- A.
0.1 seconds
- B.
0.2 seconds
- C.
0.3 seconds
- D.
0.4 seconds
Attempted by 8 students.
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