(A) Speed of sound
(B) Speed of light
(C) Depth OF water
(D) None of these
Answer: (C) Depth OF water
Sonar is used to measure depth of water. It is an underwater sound-detection technology developed by American Engineers during 1930s.
(A) Speed of sound
(B) Speed of light
(C) Depth OF water
(D) None of these
Answer: (C) Depth OF water
Sonar is used to measure depth of water. It is an underwater sound-detection technology developed by American Engineers during 1930s.