Which of the following is an application of “Echo”
Options:
(a) Height of an Aeroplane
(b) Stethoscope
(c) in SONAR system to detect the presence of submarine
(d) All of these
All Replies
Viewing 1 replies (of 1 total)
Viewing 1 replies (of 1 total)
- You must be logged in to reply to this topic.