Author Topic: What do the () mean in scientific notation?  (Read 842 times)

0 Members and 1 Guest are viewing this topic.

Offline Beamin

  • Super Contributor
  • ***
  • Posts: 1437
  • Country: us
  • If you think my Boobs are big you should see my ba
What do the () mean in scientific notation?
« on: August 04, 2017, 01:02:34 am »
IE:


Number of accurate dec places?
Max characters: 300; characters remaining: 191
Images in your signature must be no greater than 500x25 pixels
 

Offline MK14

  • Super Contributor
  • ***
  • Posts: 2385
  • Country: gb
Re: What do the () mean in scientific notation?
« Reply #1 on: August 04, 2017, 01:16:25 am »
Apparently it is the standard uncertainty.

https://physics.nist.gov/cgi-bin/cuu/Info/Constants/definitions.html

Quote
Use of concise notation
If, for example, y = 1 234.567 89 U and u(y) = 0.000 11 U, where U is the unit of y, then Y = (1 234.567 89 ± 0.000 11) U.  A more concise form of this expression, and one that is in common use, is Y = 1 234.567 89(11) U, where it understood that the number in parentheses is the numerical value of the standard uncertainty referred to the corresponding last digits of the quoted result.
« Last Edit: August 04, 2017, 01:17:59 am by MK14 »
 

Offline Beamin

  • Super Contributor
  • ***
  • Posts: 1437
  • Country: us
  • If you think my Boobs are big you should see my ba
Re: What do the () mean in scientific notation?
« Reply #2 on: August 04, 2017, 03:14:35 am »
Always wondered that. Now I can go back to figuring out the mass of the universe. Did you know the universe could be 10,000,000,000,000,000 times bigger then the 90 Bly diameter that we can see if the theory of inflation is correct, which most physicist's agree that it is! So far I have figured out the universe weighs more then 1 kg, but my math needs some work. The universe has 10^80 particles and a volume of 10^120 plank volumes. You would think it would be bigger but those are insanely bigger numbers that you can't possibly "see". The most of something I have seen is 1,000,000 which was a 4 sq ft piece of paper with 1,000,000 periods printed on it which just appeared as a blur when you looked at it from more then a few inches back. Then think that the US government wrote a check for trillions of dollars that would be 1,000,000 of those sheets of paper, that I can't fathom.  :scared: :scared: :scared: :scared: :scared: :scared: :scared:
Max characters: 300; characters remaining: 191
Images in your signature must be no greater than 500x25 pixels
 
The following users thanked this post: strangersound, MK14


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf