Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Physics Waves Intensity and Sound Level
A marine survey ship sends a sound wave straight to the sea bed. It detects an echo 4.0s later. What is the approximate depth of the sea? [Speed of sound in water (v) = 1500 m/s]
1
600 m
2
1500 m
3
3000 m
4
More than one of the above
5
None of the above