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If I understand it correctly, temperature is the measure of the average kinetic energy of a substance. Why is it then that $T\neq \bar E_{k}$ or something similar? Why is the kelvin a base unit and temperature a base quantity in The International System of Units (SI)?

Natrium
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  • The other question helps, but I am still wondering if can temperature be described only using other physical quantities and is there a need for a special unit such as the kelvin? – Natrium Apr 26 '20 at 18:06
  • What are the boxes? – G. Smith Apr 26 '20 at 19:00
  • I'm not sure if I know what you mean – Natrium Apr 26 '20 at 20:24
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    I see three box characters in your equation. Maybe it is a rendering problem that happens only in some browsers. (I’m looking at it in Safari on an iPad.) It’s happening because you didn’t use MathJax to write your math. – G. Smith Apr 26 '20 at 20:26
  • sorry, i will fix it. it is supposed to say T is not equal to E (with a subscipt ''k, mean'') – Natrium Apr 26 '20 at 20:29

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