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   sci.physics.research      Current physics research. (Moderated)      17,516 messages   

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   Message 16,247 of 17,516   
   Ed Lake to Edward Prochak   
   Re: Simplifying Einstein's Thought Exper   
   10 Jul 18 07:32:59   
   
   From: detect@newsguy.com   
      
   On Monday, July 9, 2018 at 2:13:03 PM UTC-5, Edward Prochak wrote:   
   > On Saturday, July 7, 2018 at 9:35:41 PM UTC-4, Ed Lake wrote:   
   >   
   >> All those inconsistencies can be resolved by understanding the laws   
   >> of physics.  Gravity enables a spherical world to APPEAR locally   
   >> flat.  The sun is vastly larger than the earth, thus its greater   
   >> gravity requires that the earth orbit around the sun.  The earth   
   >> beneath my feet feels motionless ("stationary") because the earth   
   >> and I are moving in unison in the same direction at the same speed.   
   >>   
   >   
   > Note there is an assumption above that is not explicitdly stated:   
   > That the laws of the universe are consistent everywhere.   
      
   If you want it explicitly stated, here it is: As far as we know, the   
   laws of the universe are consistent everywhere. (However, the laws   
   include variables - such as time and the length of a second.  So, the   
   laws work consistently with the variables to produce the same results   
   every time.  However, due to the variables the actual results can be   
   different when you compare results obtained under difference   
   time-related conditions (when one body is moving faster than the   
   other).)   
      
   >   
   >> A stone dropped from a moving train cannot drop straight down because   
   >> inertia will cause it to move with the train until gravity stops   
   >> it.  The observation that the stone fell straight down was "incorrect"   
   >> because it was inconsistent with the laws of physics.  When you   
   >> understand how events can APPEAR inconsistent with the laws of   
   >> physics while still obeying the laws of physics, then all observers   
   >> can agree on what actually happened.   
   >>   
   >> Ed   
   >   
   > You still persist in this "correct'/"incorrect" paradigm   
   > that begs for a god-like reference frame.   
      
   No, it just requires being able to tell the difference between what is   
   "real" and what is an "illusion."  You may think that the train you are   
   on is stationary and the railroad station and embankment outside are   
   moving, but that is just an "illusion."  If you understand that energy   
   was required to make the train move, and the amount of energy used by   
   the engine could not possibly make the planet move while the train   
   stands still, then you can understand how to tell the difference between   
   an "illusion" and reality.   
      
   Of course, it can be argued that it is also an "illusion" that the   
   embankment and station are standing still, since both are moving as the   
   earth spins on its axis and travels around the center of the galaxy at   
   486,000 miles per hour, but the energy produced by the train's engine   
   has nothing to do with that movement.  So, it all depends upon what you   
   are arguing.   
      
   >   
   > you are right, unless, of course, the train is   
   > standing still on the tracks! ;)   
      
   My statement was about "A stone dropped from a moving train".  Note the   
   word "moving."   
      
   > Or in my two train example,   
   >  both trains move with the same velocity.   
   >   
   > Ed P.   
      
   Your experiment was about "2 trains with windows only on the side facing   
   the other train. Nothing else to reference. Tracks and embankments are   
   out of sight.  Of course also extremely smooth ride, no vibrations to   
   indicate movement."   
      
   What is the purpose of such an experiment?  To show that you can create   
   a situation where no one can tell what is really happening?  Everyone   
   knows that.  You can do it by performing an experiment in a closed lab   
   where you have no way to know if the lab is moving or not.   
      
   The point is: If you CAN tell who is moving (by opening the window, for   
   example) then you can ALSO determine who is moving faster than whom.   
   You can do it by comparing clock tick rates (if you have identical   
   clocks).  The person whose clock ticks slowest is the person who is   
   moving fastest.   
      
   Ed   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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