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So, do we think about these differently because we are comparing
* large vs small? (if so, at what size should we switch? What about
nanotechnology?)
* many vs few? (if so, how many is enough? What if I set up 10^4
pucks on an air table all connected by spring?)
* interacting vs non-interacting? (suppose I set up 1000 airtracks
with pairs of carts; does it matter conceptually if they are weakly
connected by springs vs each track moving on its own?)
Perhaps "thermal energy" is simply "potential energy and kinetic
energy of objects that I am too lazy to deal with on an individual
basis". :-/
.... this may help explain why what I've been
saying is imperfect but not entirely crazy: