The sound from a source travelled to the bottom of the sea and the echo was hear...
Question
The sound from a source travelled to the bottom of the sea and the echo was heard 4s later. If the speed of sound in sea water is 1500ms-1 the depth of the sea isOptions
A) 6000m
B) 3000m
C) 1500m
D) 375m
Related Lesson: Speed of Sound | Mechanical Waves and Sound
The correct answer is B.
Explanation:
t = 4s ; v = 150ms-1
depth = X ; but 2X = vt
X = \(\frac {vt}{2}\) = \(\frac {1500 \times 4}{2}\)
X = 3000m
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t = 4s ; v = 150ms-1
depth = X ; but 2X = vt
X = \(\frac {vt}{2}\) = \(\frac {1500 \times 4}{2}\)
X = 3000m