From: detect@newsguy.com   
      
   On Friday, July 13, 2018 at 4:45:15 PM UTC-5, mr...@ing.puc.cl wrote:   
   > El viernes, 13 de julio de 2018, 0:33:23 (UTC-5), Ed Lake  escribió:   
   >> On Wednesday, July 11, 2018 at 8:31:48 PM UTC-5, Ed Lake wrote:   
   >>> On Tuesday, July 10, 2018 at 12:56:03 PM UTC-5, Edward Prochak wrote:   
   >>>> On Monday, July 9, 2018 at 3:11:05 PM UTC-4, Ed Lake wrote:   
   >>>>> [Moderator's note:  Huge amount of quoted text deleted.  Please quote   
   >>>>> only enough to provide sufficient context.  -P.H.]   
   >>   
   >> < snip >   
   >>   
   >>> [[Mod. note -- As Tom Roberts (& others) have pointed out, in order   
   >>> to directly compare clocks A and B, A and B must be colocated for   
   >>> the duration of the comparison, i.e., they must be at the same   
   >>> position and (be observed by *all* observers to be) moving at the   
   >>> same velocity.   
      
   >> How can you compare a moving clock (B) to a "stationary" clock (A)   
   >> if "A and B must be colocated for the duration of the comparison"?   
   >>   
   >   
   > The moving clock is assumed to be moving at a very high speed (in order to   
   > time dilation effects to be observed). So if clock A is moving at speed 0.6c   
   > in order to measure the time dilation you need a set of Einstein synchronized   
   > clocks located along the path clock A is following.   
   >   
   > This is the only way to check the readings of clock A with the readings of   
   the   
   > synchronized clocks, so the clock A reading is directly compared with a given   
   > synchronized clock B, as clock A passes through clock B location (at that   
   > instant both clocks are colocated).   
   >   
   > Afterwards, the lectures of the synchronized clocks can be compared to   
   determine   
   > the time dilation of clock A. The following diagram shows the setup.   
   >   
   > Clock A   
   >   
   > (*) --> v=0.6c   
   >   
   > (B1)....(B2)....(B3)....(B4)....(B5)....(B6)   
   >   
   > Synchronized clocks   
      
   Sorry, but your beliefs conflict with reality.  In 1971, Joseph Hafele   
   and Richard Keating performed a test where they flew 4 atomic clocks   
   around the world twice, first flying them eastward, then westward.   
   Before each trip they compared the clocks to a master atomic clock at   
   the US Naval observatory.   
      
   Before making the trips, they calculated what the results should be   
   (using both gravitational time dilation and velocity (kinematic) time   
   dilation).  After completing the trips they matched actual results to   
   the predicted results and they were within the margin of error.   
      
   Since then, others have performed similar experiments and got similar   
   results.  They did NOT travel faster than commercial airliner speeds,   
   and they did NOT need any synchronized clocks positioned along the way.   
      
   Sources: https://en.wikipedia.org/wiki/Hafele%E2%80%93Keating_experiment   
   http://hyperphysics.phy-astr.gsu.edu/hbase/Relativ/airtim.html   
      
   Ed   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)