Friday, 4 December 2015

special relativity - Does a ticking watch have more mass?



In the video on YouTube, The Real Meaning of E=mc² | PBS| Space Time Studios, it claims that a ticking watch has more mass then a non ticking watch due to the intrinsic KE, PE and thermal energy of the watch's internal movements that manifests itself as part of the watch's mass.


Is this correct ?


To me there is something wrong with this argument, but I cannot put my finger on it.




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