How Fast Do Sound Waves Travel in Ocean Water?

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SUMMARY

The speed of sound waves in ocean water was calculated using sonar data from a stationary research ship. The sound wave, with a frequency of 1.18 × 103 hertz, traveled a total distance of 648 meters (down and back) in 0.425 seconds, resulting in a speed of 762.353 m/s. The period of the sound wave was determined to be 0.000847 seconds. The discussion emphasized the importance of using the correct formula, specifically v = d/t, for calculating the speed of sound in this context.

PREREQUISITES
  • Understanding of basic physics concepts such as speed, distance, and time.
  • Familiarity with sonar technology and its applications in marine research.
  • Knowledge of sound wave properties, including frequency and period.
  • Ability to perform calculations involving basic algebra and unit conversions.
NEXT STEPS
  • Research the principles of sonar technology and its applications in oceanography.
  • Learn about the effects of temperature and salinity on sound speed in seawater.
  • Explore advanced wave properties, including wavelength and their relationship to frequency.
  • Investigate the mathematical modeling of sound propagation in different mediums.
USEFUL FOR

Marine scientists, oceanographers, physics students, and anyone interested in the properties of sound waves in aquatic environments will benefit from this discussion.

ode19
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1. A stationary research ship uses sonar to send a 1.18 × 103-hertz sound wave down
through the ocean water. The reflected sound wave from the flat ocean bottom 324 meters
below the ship is detected 0.425 second after it was sent from the ship.
a. Calculate the speed of the sound wave in the ocean water.
b. Calculate the speed of the sound wave in the ocean water
c. Determine the period of the sound wave in the ocean water.

2. a. wavelength= velocity*Period
b. v=d/t
c. Period= 1/Frequency
3. w=vT= (distance/time)/(Frequency)= d/(tf) and i got .6461 meters
b. i assumed its just distance/time and got 762.353 m/s
c. i used the equation Period= 1/Frequency and i got .000847
 
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Welcome to PF, ode19.
The velocity is found from timing the leading edge of the pulse down and back up. Use v = d/t with a distance to 2x324 meters because it has to go down and back up.
Avoid using any formula with frequency, period or wavelength in it for this kind of question - it does not matter what those are in a question like (b) where you are only concerned with the motion of the pulse or beginning of a train of waves.
 
Thank you very much.
I now understand the question. I appreciate it.
 
Most welcome.
 

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