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2 votes
1 answer
88 views

Constant of integration in Equilibrium Theory of Tides

I am preparing an elementary derivation of Newton/Laplace's equilibrium theory of tides. The derivation of the tractive force is understood, as is the derivation of the differential equation for ...
jamesthenabignumber's user avatar
5 votes
2 answers
2k views

How does the Moon cause the tides?

I am considering the following question, but I can't quite figure it out... I have looked up differential gravity, but I cannot derive the equation for the effect on Earth, and I haven't found any ...
Meep's user avatar
  • 3,997
21 votes
3 answers
11k views

How quickly was the Earth rotating 250 million years ago?

The Earth is slowing at a rate of $4.7\times10^{-4}$ miles per second every 100 years due to tidal forces of the moon. See: http://en.wikipedia.org/wiki/Earth%27s_rotation http://imagine.gsfc.nasa....
user46335's user avatar
  • 311