A submarine is inside water 3.77 km below from a ship. The sends ultrasonic waves that is reflected by the submarine and is received back in 5.2 seconds. What is the speed of ultrasonic waves in water?

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Solution

Step-1 Given-
$D e p t h o f t h e s u b m a r i n e (d) = 3.77 k m = 3770 m$
$T o t a l t i m e (t) = 5.2 s$
Step-2 Finding the speed of the ultrasonic wave
Sound go from ship to submarine then came back from submarine to ship
$∴ S p e e d o f u l t r a s o n i c w a v e = \frac{2 (D e p t h o f t h e s u b m a r i n e)}{T o t a l t i m e}$
$S p e e d o f u l t r a s o n i c w a v e = \frac{2 \times 3770}{5.2}$
$= 1450 m / s$

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A submarine is inside water 3.77 km below from a ship. The sends ultrasonic waves that is reflected by the submarine and is received back in 5.2 seconds. What is the speed of ultrasonic waves in water?

Step-1 Given- Depthofthesubmarine(d)=3.77km=3770mTotaltime(t)=5.2sStep-2 Finding the speed of the ultrasonic waveSound go from ship to submarine then came back from submarine to ship ∴Speedofultrasonicwave=2(Depthofthesubmarine)TotaltimeSpeedofultrasonicwave=2×37705.2 =1450m/s