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chuckula
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How about π in the Sky? (or cloud)

Thu Mar 14, 2019 8:14 am

This is how to celebrate π day in style!!

http://www.numberworld.org/blogs/2019_3_14_pi_record/
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 8:53 am

Meh, back in our day we used to use slide rulers to compute for Pi and we liked it.
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chuckula
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 8:58 am

Krogoth wrote:
Meh, back in our day we used to use slide rulers to compute for Pi and we liked it.


Intel's failed 10nm process means Ice Lake is a bunch of slide rulers combined together with a sticky substance that doesn't start with the letter "g"..... CONFIRMED!
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 1:24 pm

You only need 39-40 digits of Pi to calculate the circumference of the universe to an accuracy of the diameter of a hydrogen atom.
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just brew it!
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 2:01 pm

Mr Bill wrote:
You only need 39-40 digits of Pi to calculate the circumference of the universe to an accuracy of the diameter of a hydrogen atom.

Only if your measurement of the radius of the universe is of comparable accuracy!
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 2:05 pm

Mr Bill wrote:
You only need 39-40 digits of Pi to calculate the circumference of the universe to an accuracy of the diameter of a hydrogen atom.


Frikkin' NASA just eyeballing stuff to the nearest hydrogen atom...
 
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 2:29 pm

cphite wrote:
Mr Bill wrote:
You only need 39-40 digits of Pi to calculate the circumference of the universe to an accuracy of the diameter of a hydrogen atom.


Frikkin' NASA just eyeballing stuff to the nearest hydrogen atom...


And people wonder why their funding gets cut at every drop of the hat...
 
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 3:59 pm

Shobai wrote:
cphite wrote:
Mr Bill wrote:
You only need 39-40 digits of Pi to calculate the circumference of the universe to an accuracy of the diameter of a hydrogen atom.


Frikkin' NASA just eyeballing stuff to the nearest hydrogen atom...


And people wonder why their funding gets cut at every drop of the hat...


Exactly. They already know the 41st digit so why not use it?

Slackers.
 
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 4:02 pm

cphite wrote:
Exactly. They already know the 41st digit so why not use it?

Slackers.

Probably returns a result smaller than the Planck length.
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Re: How about π in the Sky? (or cloud)

Thu Mar 14, 2019 5:16 pm

cphite wrote:
Shobai wrote:
cphite wrote:

Frikkin' NASA just eyeballing stuff to the nearest hydrogen atom...


And people wonder why their funding gets cut at every drop of the hat...


Exactly. They already know the 41st digit so why not use it?

Slackers.
Not a computational wizard, but maybe because N bits to accurately represent n decimal digits goes as.... N = n/(Log10(2))
27 bits for 8 digits
54 bits for 16 digits
80 bit for 24 digits
107 bits for 32 digits
133 bits for 40 digits
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Re: How about π in the Sky? (or cloud)

Fri Mar 15, 2019 11:41 am

just brew it! wrote:
Mr Bill wrote:
You only need 39-40 digits of Pi to calculate the circumference of the universe to an accuracy of the diameter of a hydrogen atom.

Only if your measurement of the radius of the universe is of comparable accuracy!
I was fooled by that at first reading also. You can calculate a circle or sphere that roughly encompasses the universe using 3 or even 3.14 as the estimate of Pi but the length of the circumference uncertainty would probably be light years. The extra digits are to refine the accuracy of the circumference (the length) to less than the diameter of a hydrogen atom.
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