Physics · Sound Waves
To hear a distinct echo, what must be the minimum time interval between the original sound and the reflected sound?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Less than 1/20 of a second
- 2Exactly 1/20 of a second
- 3Less than 1/10 of a second
- 4Greater than or equal to 1/10 of a second✓
Correct answer
Greater than or equal to 1/10 of a second
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