We must first note that the ocean water which must produce the tidal bulge must be MOVED from other parts of the oceans, to be "piled up" at that one spot at that moment.
This first makes clear one very incorrect assumption that most people seem to have, that the tides only exist because of the MOTION of the Earth or Moon. Not so! If the Earth and Moon could somehow be "bolted in place", there would still be that same tidal bulge on the FRONT side of the Earth (toward the Moon). And fairly simple and obvious logic shows that there would ALSO be the same tidal bulge on the BACK side of the Earth (opposite where the Moon is)! The motions have nothing to do with WHY there are tides! However, the reality is that the Earth and Moon MUST constantly move, such as the Moon orbiting the Earth, such that it does not shortly gravitationally fall down to hit us!
It just SEEMS that the rotational motion "must" be causing the tides, so nearly everyone seems to believe that. Even many web-pages that claim to provide an explanation for the tides, present such wrong explanations!
Next, we must realize that all that water is rather massive, and that massive bulge of water has to be at one location at 6 am and 1/4 of the way around the Earth six hours later at noon! So there HAS to be some (apparent) lateral motion of water to transfer all that water across the oceans. (Remember that the water itself is actually trying to STAY IN PLACE, lined up with the Moon, and it is actually the EARTH and the rest of the oceans which are rotating underneath that tidal bulge.) In fact, we can see that it should be as much as that 6300 miles (1/4 of the way around the Earth's Equator) in each six hour period, or slightly over 1,000 miles per hour!
This is not quite actually true, mostly due to frictional losses in the ocean against the ocean bottom. But the speed of the tidal bulge across an open ocean can be around 800 mph. This brings up another seemingly obvious question! If you are in a small boat in the middle of the ocean, and an 800 mile wave comes along, how come there is not massive destruction?
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For the ocean tides, the length of the waves (wavelength) is even longer, and still the height of the tide waves are only around one to two feet in the open ocean. So even though you might be in a small boat in the middle of the ocean and the tide goes by, you probably will not even notice it! The ONLY effect would be where your boat was gradually lifted up about a foot or two over a period of several hours, and then gradually lowered back down that foot or two. In the meantime, you would have experienced many thousands of wind-generated surface waves that would have rocked your boat around. So even though you actually would have experienced the passage of the tide wave at maybe 800 mph, you would have had no possible way to realize it!
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C Johnson, Theoretical Physicist, Physics Degree from Univ of Chicago