Properties of Sound Waves DOL

In which type of wave do the particles move parallel to the direction of the wave’s travel?

• A. Transverse wave

• B. Longitudinal wave

• C. Both transverse and longitudinal waves

• D. Neither transverse nor longitudinal waves

What is the primary purpose of SONAR technology?

• To detect and measure electromagnetic waves

• To communicate with satellites

• To map the ocean floor and detect objects underwater

• To transmit light signals underwater

Tags

NGSS.HS-PS4-5

If the speaker vibrates back and forth at 200 Hz how much time passes between each time it produces a maximum in pressure? (Hint 1 Hz is 1/second)

• 0.2 seconds

• 0.200 seconds

• 0.005 seconds

• 0.02 seconds

Tags

NGSS.HS-PS4-1

A sonar system with a 120 kHz pulse displays ocean depth as 200 m. It takes 268 ms for the sonar to travel to the ocean floor and back. What is the speed and wavelength of the pulse? v= d/t λ = v/f

• v = 750 m/s, λ = 0.0062 m

• v =1,493 m/s, λ = 0.012 m

• v = 890 m/s, λ = 0.0074 m

• v = 3,300 m/s, λ = 0.0056 m

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

You are using sonar over a spot in the ocean known to be 25 m deep. The system emits a 60.0 kHz sound pulse into the water. It takes 75 ms for the sound to travel to the ocean floor and back to the sonar system. Determine the speed of sound in the ocean and the wavelength of the sonar pulse. Round the wavelength to the nearest hundredth and the speed to the nearest whole number. (Use v = d/t and λ = v/f)

• Speed: 666.7 m/s, Wavelength: 0.01 m

• Speed: 400 m/s, Wavelength: 6.67 cm

• Speed: 333 m/s, Wavelength: 2.78 cm

• Speed: 400 m/s, Wavelength: 5.00 cm

Tags

NGSS.HS-PS4-1