![]() When will perfect destructive interference occur? -When two waves that are 180 degrees out-of-phase interfere. What does the term "in phase" refer to? -Waves in phase have identical wavelengths and are aligned peak-to-peak and trough-to-trough When will perfect constructive interference occur for waves that are in phase and moving at the same velocity? -When waves with identical wavelengths interfere. What results when two waves, in phase and with the same wavelength, interact? -A wave with an amplitude that is the sum of the amplitudes of the initial two waves. Water depth What is an interference pattern? -The wave pattern produced when two or more waves interact. The time it takes for one full wavelength to pass a given point Based on the equations for determining the speed of shallow-water waves, which one of the following variables is necessary to determine the speed of shallow-water waves? Select only one answer. reduced wave height Of the following statements about ocean waves, which one(s) describe wave period? -The inverse of wave frequency Destructive wave interference results in _. ![]() Constructive interference results in larger waves whereas destructive interference produces: -smaller waves. The largest wind-generated waves tend to be associated with the: -westerlies. The height of a wave depends upon: -fetch, wind duration, and wind speed. (T/F) FALSE The first wave that forms when the wind begins to blow across the ocean surface is a: -capillary wave. (T/F) TRUE Rogue waves are generated by destructive interference patterns of ocean swells. A wave train is caused by wave energy moving more slowly than individual waves. What is a swell? -Swells are long-crested, uniform, symmetrical waves that require very little energy to travel out of their area of origin. Which of the following statements about wave period is most accurate? -Wave period is the inverse of wave frequency. If a tsunami warning is issued for your island, how many hours will you have before the waves arrive? -10.14 hours What is the crest of a wave? -the highest part of the wave What is the trough of a wave? -the lowest part of the wave What is the wave height? -the distance between the highest and lowest part of the wave What is the wavelength? -the distance between consecutive wave crests or troughs What is the wave period? -the time it takes for one wavelength of a wave to pass a particular point How are wave period and wavelength related? -Waves with shorter periods have shorter wavelengths. The average water depth between your island and Japan is 4900 m. An earthquake of magnitude 8.5 off the coast of Japan, 8000 km away, generates a tsunami with a wavelength of 200 km. principle of decreasing orbital motion with depth You live on an island in the Pacific. That is a practical application of utilizing the _. period Submarines sometimes ride out heavy storms in deep water by submerging. The speed of a deep-water wave is proportional to: -wavelength. The diameter of a wave orbital at the surface is equal to: -wave height. Wave speed is equal to: -wavelength divided by period. (T/F) TRUE The ratio of wave height to wavelength is called the: -wave steepness. (T/F) FALSE Deep-water waves move faster than shallow water waves because they are not slowed by friction with the ocean bottom. ![]() (T/F) FALSE A shallow-water wave must form in water depth less than 100 meters. (T/F) TRUE The horizontal distance between two successive troughs is called the wave height. Waves at the ocean surface are called orbital or interface waves. ![]()
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