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Units (split from What is Time?)


michel123456

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If you don't like $

because indeed dollars squared are a bit strange (like s2).

It is good to recall that the constant in E=mc2 is not c, but c2. What is the square of a velocity? a velocity multiplied by a velocity? isn't that the same bizarre as $ multiplied by $?

 

 

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51 minutes ago, michel123456 said:

If you don't like $

because indeed dollars squared are a bit strange (like s2).

It is good to recall that the constant in E=mc2 is not c, but c2. What is the square of a velocity? a velocity multiplied by a velocity? isn't that the same bizarre as $ multiplied by $?

Just as bizarre, as it is not bizarre at all. The bizarre thing is trying to assign a physical meaning to the units of a proportionality constant.

On 4/19/2018 at 1:25 PM, michel123456 said:

Do accountants use dollars squared?

A brief Google shows that dollars squared will show up in some calculations. A variance squares the variable in question, and also a least-squares fit gives rise to a squared variable.

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