Editing Talk:2312: mbmbam

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::Please forgive my ignorance here: Is not a "degree" an angular unit?  
 
::Please forgive my ignorance here: Is not a "degree" an angular unit?  
 
::[[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 17:20, 29 May 2020 (UTC)
 
::[[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 17:20, 29 May 2020 (UTC)
:::The concept that a plane angle is a dimensionless unit is a tenet of the International System of Units (SI).  It works something like this.  "Degrees" and "Radians" are two ways of expressing the same thing, the size of an angle.  If you have an angle and you draw an arbitrary circle with the angle's vertex as the circle's center, so that your angle now "subtends" an arc of the circle, then the size of your angle in radians is defined to be the length of that arc divided by the length of the radius of the circle.  The circumference of the whole circle has length 2π·r, so an angle of 360 degrees is also an angle of 2π·r/r radians.  The numerator and the denominator are dimensionally both lengths.  Dividing a length by a length yields a dimensionless quantity, i.e. one with no "unit".  Consequently radians are dimensionless, and so are degrees.  [[User:JohnB|JohnB]] ([[User talk:JohnB|talk]]) 19:52, 29 May 2020 (UTC)
 
  
 
Is my vision going blurry, or does that second panel say "milliibarn"? -- [[User:Peregrine|Peregrine]] ([[User talk:Peregrine|talk]]) 09:09, 28 May 2020 (UTC)
 
Is my vision going blurry, or does that second panel say "milliibarn"? -- [[User:Peregrine|Peregrine]] ([[User talk:Peregrine|talk]]) 09:09, 28 May 2020 (UTC)

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