I need help answering 11-13. #11. Swell is a type of transitional wave.(true/fal

Question

I need help answering 11-13.

#11. Swell is a type of transitional wave.(true/false?

12. An ocean wave has a Wavelenght of 245 km and a water depth of 720 meters. What type of wave is it? (make sure to show your calculations below)(Please help me show the work.

13. Which of the following will not cause a tsunami?

Swell is a type of transitional wave. alse true DQuestion 12 4 pts An ocean wave has a Wavelenght of 245 km and a water depth of 720 meters. What type of wave is it? Imake sure to show your calculations below HTML Editor Question 13 2 pts Which of the folowing will not cause a tsunami? Submarine landslides Storms ower the ocean Submarine volcanic explosion Undersea Earthquakes Meteor impact in the ocean

Explanation / Answer

11. False

Because Swells are deep-water waves, which means that the depth(D) of the water is greater than one-half of the wavelength(L) of the of a wave. D>1/2L

whereas Transitional waves occurs when the water depth(D) is less than one-half of the wave's wavelength(L) but gretaer than one-twentieth wavelength(L).

1/20L < D< 1/2L

Shallow-water waves are wave travelling in water where water depth(B) is less than one-twentieth of the wavelength(L). D < 1/20 L

12. Given Wavelength L= 245km, = 245*1000mts = 245000mts { since 1km = 1000 mts}

Water depth D = 720 meters

Case 1:- 1/2L = 245000/2 = 122500mts

D < 1225000mts

Case 2: 1/20 L = 245000/20 = 12250mts

D < 12250 mts

In both the cases Depth of the water is less than the Wavelength.

So thw wave can either be transitional or shallow-water wave.

13. Storms over the oceans donot cause Tsunamis.

Tsunamis are caused by the tidal waves also known as Seismic sea waves caused by the displacement of large volume of water in the oceans. They are generated by Seafloor Earthquakes, Submarine Volcanism, Submarine Landslides, Meteroic impacts in the oceans, Glacial Calvings and underwater explosions.

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