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Sound travels at a speed of 1450 ms–1 through water. A submarine detects objects around it by sending sound waves and detecting echo (reflected sound) heard after 4 seconds. Then the object must be at a distance of: 
  • a)
    1.450 km
  • b)
    2.900 km 
  • c)
    4.350 km
  • d)
    5.800 km
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Sound travels at a speed of 1450 ms–1 through water. A submarine...
Actually, the speed of sound in air at sea level and at room temperature is approximately 343 meters per second, or about 1235 kilometers per hour. This value can vary depending on factors such as temperature, humidity, and altitude.
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Community Answer
Sound travels at a speed of 1450 ms–1 through water. A submarine...
2d = v × t
d  = (v x t)/2
d = (1450 x 4)/2
= 2.900 km.
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Sound travels at a speed of 1450 ms–1 through water. A submarine detects objects around it by sending sound waves and detecting echo (reflected sound) heard after 4 seconds. Then the object must be at a distance of:a)1.450 kmb)2.900 kmc)4.350 kmd)5.800 kmCorrect answer is option 'B'. Can you explain this answer?
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