XPost: sci.physics   
   From: chris.m.thomasson.1@gmail.com   
      
   On 1/6/2026 1:57 PM, Paul.B.Andersen wrote:   
   > Den 06.01.2026 09:15, skrev Thomas Heger:   
   >> Am Sonntag000004, 04.01.2026 um 20:51 schrieb Paul.B.Andersen:   
   >>>   
   >>> E = mc² is the energy content, or the energy equivalent of   
   >>> the mass m. Mass is invariant, so this equation is valid for   
   >>> all speeds of the mass.   
   >>   
   >> You contradicted yourself!!   
   >>   
   >> Here your claim is, that mass is invariant, while a little below you   
   >> claim, that energy is conserved, while mass has vanished from a   
   >> radioactive sample.   
   >>   
   >> But you can't keep both claims, because they contradict each other.   
   >   
   >   
   > Invariant means "the same in all frames of reference"   
   > or "independent of speed".   
   >   
   > It does _not_ mean "constant".   
   >   
   > Mass is invariant.   
   > The mass of an object is the same in all frames of reference.   
   > The mass of an object does not depend on the speed of the object.   
   >   
   > But mass can change. Heat the object, and its mass will increase,   
   >   
   > I have told you before, but I know you will not learn.   
   > You never do.   
   >   
   >   
      
   Its odd to think of a cup of water as the water evaporates. The cup is   
   an object with its own mass. But, now its holding water. So, the cup   
   "weighs" more in a sense... But, as the water evaporates, that weight   
   will go back to the weight of the original cup...   
      
   Think of two equal mass cups on a scale. They balance. Add water to one,   
   its not balanced. However, the water will evaporate and the scale shall   
   go back to balanced over time?   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)