Sunday, July 19, 2015

orbital motion - Where does energy for high and low tides come from?


High and low tides are caused by Moon gravity attracting water. Now there's friction, waves cause erosion, their energy is used in power plants yet the tides work for millions of years and are perceived as a free source of energy.


Now that's impossible - energy can't just appear out of nowhere.


What is the energy source for the high and low tides?




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