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How many times have you been told that perpetual motion cannot be achieved?
This is strange when we live on a globe that is in perpetual motion or something darn near like it.
The rotation of our earth within an associated (but unattached) atmosphere causes winds by viscous drag. The air that is our atmosphere nominally weighs .075 pounds per cubic foot at sea level and lessens with altitude. As the surface of our earth turns against the atmosphere at least two really great things happen.
First would be prevailing winds which at the 45th parallel here in Oregon come off the Pacific Ocean traveling from West to East. With a viscous couple at the boundary layer someone with more time and shook-um might give us a SWAG number for that kinetic energy based upon the surface area of the earth, viscosity and weight of air, velocity of rotation and form factor. I am going to cop out and say it is a mega bunch.
The second wonderful event is created by the ability of air to adsorb water vapor. As the air comes ashore here in the NW after a long trip over the Pacific it carries considerable water vapor. The weight of the water vapor is a another great big number (GBN).
As the winds push moisture laden air up slope as they come ashore the temperature gradient, cooler temperature, at higher elevations reduces the amount of vapor the air can hold. It rains.
What does that mean to us? It means that we can count upon a continual force produced by the air mass moving across the earth and there is a gazillion gallons of water vapor much higher than the surface of the earth. The weight of this water vapor is another tremendous potential energy.
Every sailor and skier knows that the wind and gravity are our friends. They also offer perpetual potential energy. Add to these wave motion, tides, temperature and barometric pressure changes harvest-able force differential.
"I see a shining city~~" on the shore with rain (fresh water) captured in reservoirs above and the excess water run through turbines. Sea water lifted by a series of air foils and run through turbines etc. etc. Don't sell your home in Topeka or stock in fossil fuels yet but be watchful.
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