- #211
PAllen
Science Advisor
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DaleSpam said:Sure, but if you are measuring the extent of an object it takes 4 numbers: length, height, width, and duration.
Temperature certainly can be a dimension in some space, e.g. in state space, but it does not measure the extent of an object. Additionaly, from a mathematical perspective, temperature is not a dimension in the same mathematical space as space and time. Similar arguments cannot be made for excluding duration.
Just to play a little devil's advocate here, I think an objective difference for duration can be made (not questioning SR/GR conceptual model of 4-d spacetime with 'all history' materialized). That is, you can define a variety of measurement methods for spatial dimensions as measured by a specified observer. I can think of no way to measure the duration of an object, in the real world (short of particles whose complete history is limited).