Re: [Phys-l] United States Geological Survey

[Bernard Cleyet <bernardcleyet@redshift.com>]

No is typo.   For an homogenous earth there are two sets of tides the  
sun tides ~ 1/3 those of the moon.  Periodically superimposed there's  
only one set called spring tides, etc.

bc  couldn't find Bernoulli


On 2008, Mar 15, , at 11:22, Jacques Rutschmann wrote:

> For more fun, check out this explanation about tides (also thanks  
> to the
> USGS):
> http://sfports.wr.usgs.gov/SFPORTS/glossary.html#MLLW (*)
>
> "There are two low tides in each tidal cycle (so usually two low tides
> in each day). These two low tides are not quite the same height  
> because
> one tide is generated by the gravitational interaction with the sun
> (which is small), and the other is generated by the gravitational
> interaction with the moon (which is not so small)"
>
> I believe that these are not typos but misconceptions...
>
> Jacques