Recent content by feynman60

we know the lagrangian l=ke-pe right in case of fields is called "lagrangian density" let particle with mass "m" and position "x" it kientic energy= 1/2(mv^2) so lagrangian =1/2(mv^2)-v(x) , v(x)=potential energy in case the field lagrangian density how can i determine the lagragian...

[FONT="Arial"][SIZE="5"][/FONT hi i know that day is rotation of Earth about it axis and year is rotation of Earth about the sun , the time connected with rotation my question is when remove the rotation we don t get the time? so don t be found the time?