On 24 January 2014 14:29, Stephen Paul King <[email protected]>wrote:
> I do not see how what is by definition fixed and timeless can be > considered to have any property that is an actual > action<http://en.wikipedia.org/wiki/Action_(physics)> > . > Following the supplied link gives this definition: In physics <http://en.wikipedia.org/wiki/Physics>, *action* is an attribute > of the dynamics <http://en.wikipedia.org/wiki/Dynamics_%28physics%29> of > a physical system <http://en.wikipedia.org/wiki/Physical_system>. It is a > mathematical > functional <http://en.wikipedia.org/wiki/Functional_%28mathematics%29>which > takes the > trajectory <http://en.wikipedia.org/wiki/Trajectory>, also called *path*or > *history*, of the system as its argument and has a real > number<http://en.wikipedia.org/wiki/Real_number>as its result. Generally, the > action takes different values for different > paths.[1]<http://en.wikipedia.org/wiki/Action_%28physics%29#cite_note-mcgraw1-1>Action > has the > dimensions <http://en.wikipedia.org/wiki/Dimensional_analysis> of > [energy]<http://en.wikipedia.org/wiki/Energy> > ยท[time] <http://en.wikipedia.org/wiki/Time>, and its SI > unit<http://en.wikipedia.org/wiki/SI_unit>is > joule > <http://en.wikipedia.org/wiki/Joule>-second<http://en.wikipedia.org/wiki/Second>. > This is the same unit as that of angular > momentum<http://en.wikipedia.org/wiki/Angular_momentum> > . > All the above can be calculated in a block universe (or, equivalently, for an event that took place in the past). Hence something that is "by definition fixed and timeless" (systems in a block universe) *can *indeed "be considered to have any property that is an actual action<http://en.wikipedia.org/wiki/Action_%28physics%29>" - specifically, they can have the property of action itself, as described! -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.
