Formula deep page
Echo Minimum Distance
Minimum distance = (Speed of sound × 0.1s) / 2 = 17.15 m
This formula belongs to the chapter "Sound" in Class 8 Science. Use it after identifying the right variables, matching the chapter context, and writing the substitution clearly.
How to use it
- Identify the quantity you need to find.
- Check the related variables and units from the question.
- Substitute values carefully into the formula.
- Simplify step by step and write the final statement.
Worked cue
Shout at wall 20m away: echo comes in 20×2/340 = 0.12s (heard as echo)
Rule note: Human ear cannot distinguish sounds less than 0.1s apart