Question

write a brief note on sea waves

Answer 1

They are formed by the energy of the wind through direct pressure of the airflow on the windward sides of the crests and through its friction on thewave's surface. The development ofwaves caused by wind begins with the formation of ripples, which are capillary waves. ... Shallow seas tend to limit the growth of waves. here is your answer

Answer 2

waves on the surface of seas and oceans. Because of their great mobility, water particles easily come out of equilibrium and oscillate under the influence of various kinds of forces. Waves are caused by the tide-forming forces of the moon and sun, by winds, by fluctuations in atmospheric pressure, by underwater earthquakes, and by deformations of the ocean floor.

According to their cause, sea waves are subdivided into normal tide waves, waves caused by wind, waves caused by fluctuations in atmospheric pressure (seiches), and seismic waves (tsunamis). In most cases, wave motions are characterized by irregular shape. It is necessary to distinguish between the shifting of particles within the wave and the apparent motion of the wave’s shape, which consists in the movement of its profile through space. The particles involved in the wave are moving along closed or almost closed trajectories.
The main characteristics of sea waves are height, which is the vertical distance between the crest and the trough of the wave; length, which is the horizontal distance between two adjacent crests or troughs; the velocity of motion of the wave shape, or phase velocity; and the period. The period of waves caused by wind does not exceed 30 sec; those caused by atmospheric-pressure variations or by earthquakes have periods measured in minutes, dozens of minutes, or hours. The periods of normal tide waves are expressed in hours.

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