Minimum distance for echo

How far should an obstacle be to hear an echo?

Created by Mahesh Shenoy

• #education
• #cbse
• #ncert
• #physics
• #science
• #online_learning
• #online_lesson
• #khan_academy
• #india_science
• #study_material
• #class_9_physics
• #sound
• #echo
• #distance_to_echo
• #echo_numerical
• #echo_range