The Tidal Waves
First of all, tide is the rise and fall of water caused by gravitational forces of the moon and sun on the oceans of the earth. Generally speaking, tidal cycles contain two high tides and two low tides each day. During the time between high and low tides there will obviously be current flow. The time between high and low tides is a little over 6 hours and the entire tidal cycle repeats itself approximately fifty minutes later each day. So if you know that low tide is at 0800 today you can estimate that it will be at least 0850 tomorrow.
The tidal bulge that occurs during high tide in the world ocean follows the revolution of the moon and the earth rotates eastward through the bulge once every 24 hours and fifteen minutes. The moon appears to rotate around the earth every day. However, it is the earth's rotation that gives this appearance. The moon actually orbits the earth in an elliptical pattern, taking 27.3 days to complete one orbit.
Earth is also being pulled......
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