One moon - 2 Tides

Things I find interesting. The moon's gravity pulls the ocean away from the surface of the earth to create one of our daily tides but the other tide is a result of the earth not rotating directly on it's access. This wobble is a result of the gravitational effect of the earth on the moon. Bit like a hammer thrower at the olympics. The earth leans away from the moon. So while the water is being pulled off one side of the earth by the moon, water is being flung off the other side of the earth by centrifugal force. Bit like swirling your coffee around in your cup.

And as usual I could have it all wrong again.

Did you know that when the moon use to rotate, the earths gravitational force on it resulted in the surface of the moon lifting up. Bit like a ripple moving across the surface. Well so they say.

How do you account for 'dodge tides' in South Australia then. One tide per day ??.

Select to expand quote

Bruski068 said..
South Australia has always been dodgy lol

You should be ashamed of yourself Brusk, they're going to have the biggest battery in the world
to cure their power woes.........so there !!!.

Well, I read this explanation in a book call "Do Dolphins Ever Sleep". Might have been recommended reading from 'Sir' Alan Lucas. Now, if you do get the opportunity to get hold of this book, it's a good read. Full of interesting facts, if you're that way inclined. Now after reading the detailed explanation on tides, I was convinced it was a plausible explanation.

But if you have another book or information that may contradicts what was written in "Do Dolphins Ever Sleep", then please let me know because I like to keep an open mind on these things especially when another explanations is given.

So much to learn in life, but so little time.

Yeah, and wait till you read how sails generate lift. Blows all the sailing club bar talk explanations out of the water. But I'll save that for another thread.

there is an in-depth explanation here:

oceanservice.noaa.gov/education/tutorial_tides/tides02_cause.html

Clever choice of words fishmonkey

Select to expand quote

samsturdy said..

Bruski068 said..
South Australia has always been dodgy lol

You should be ashamed of yourself Brusk, they're going to have the biggest battery in the world
to cure their power woes.........so there !!!.

I suppose I'm allowed to be a thread Pirate on my own thread. I wonder if more homes/businesses in SA have private generator setups than the rest the Australian Average. I'd have one if I lived down there.

A few months back when Debbie did Airlie, there were a lot of Gen sets sold and some people in the SE Qld only lost power for less than 24hrs. Nothing compared to what South Australia experienced.

Select to expand quote

samsturdy said..

Bruski068 said..
South Australia has always been dodgy lol

You should be ashamed of yourself Brusk, they're going to have the biggest battery in the world
to cure their power woes.........so there !!!.

And the question nobody in the media seems to want to ask is 'do you get a one year warranty with that battery or two years?' also what are they going to do with the battery when the battery no longer wants to take a charge and has to be replaced?

The problem with the centrifugal theory is that the earth and moon are in free fall around each other. They are captive with angular velocity falling around a balanced point known as a barycenter. The strength of the attraction and the speed of the angular velocity balance each other to create on orbit.

If centrafugal force was earth was stronger than the gravitationl pull of the moon, the distance between the earth and the moon would increasce to balance.

The way I understand the centrifugal tide theory to be correct is:

The moon and the earth would have to be connected by an unbreakable bond and then the velocity of the orbit would have to be sped up.

The earth rotates around the barycenter at aprox 50km/ph and the moon at aprox 3600km/ph
I would think that given the moons low gravity,, according to the centrifugal force theory, all the rocks and dust would fling of the moon, but that's not the case.

"On the opposite side of the Earth, or the "far side," the gravitational attraction of the moon is less because it is farther away. Here, inertia exceeds the gravitational force, and the water tries to keep going in a straight line, moving away from the Earth, also forming a bulge (Ross, D.A., 1995)."

And this:

Water on the opposite side of Earth facing away from the Moon also bulges outward (high tide), but for a different and interesting reason: in reality, the Moon and the Earth revolve together around a common gravitational center between them, or center of mass. Here's a rough but helpful analogy: picture yourself swinging a heavy object attached to a rope around your body as you rotate. You have to lean back to compensate, which puts the center of mass between you and the object. With the Earth-Moon system, gravity is like a rope that pulls or keeps the two bodies together, and centrifugal force is what keeps them apart. Because the centrifugal force is greater than the Moon's gravitational pull, ocean water on the opposite side of the Earth bulges outward.
^^^
I think there has been some physics misunderstandings when it comes to Tides