A sound pulse sent vertically downwards into the earth is reflected from two different layers of the earth such that echoes are heard 1.2s and 1.4s. Assuming speed of the pulse is 2000ms−¹; calculate the distance between the layers.
A. 200 m
B. 400 m
C. 2400 m
D. 2600 m
E. 2800 m
Correct Answer:
Option A = 200 m
Explanation
X = Δvt/2 = {(2000×14)2 – (2000×12)2} = 200 m.
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![A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560m/s]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560m/s]")