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प्रश्न
Sound travels much farther in water than light, and thus, is used for various underwater applications. A sonar signal sent to find the depth of ocean takes 4 s to return. What is the depth of the ocean at that location if the speed of sound in seawater is 1500 m/s-1?
अति संक्षिप्त उत्तर
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उत्तर
The signal takes 4 s to travel down and back, so the one-way time is $$2,\mathrm{s}$$. Therefore, the depth is $$1500 \times 2 = 3000,\mathrm{m}$$.
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