1. The problem statement, all variables and given/known data Hello, I am a French teacher who teaches physics in English. I've proposed to my pupils this work about the tides.http://vfsilesieux.free.fr/2deeuro/Thetides.html" [Broken] I would very much enjoy any kind of correction (vocabulary, grammar, ideas) to improve the quality of this work (questions + corrections). Thanks in advance for your help. 2. Relevant equations 3. The attempt at a solution It would certainly benefit from the inspection of a native English scientific eye.