Roundest ball ever made

SmoothStroke

SmoothStroke

Swim for the win.
Silver Member
And this is why I don't post often. It's obvious none of you completed 7 years of high school.
There isn't one of you who can insert a round ball in an oval peg.
You all get the 7 out on a heated billiard table with somewhat round balls.
 
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Sheldon

Sheldon

dontneednostinkintitle
Silver Member
SmoothStroke said:
And this is why I don't post often. It's obvious none of you completed 7 years of high school.
There isn't one of you who can insert a round ball in an oval peg.
You all get the 7 out on a heated billiard table.
Click to expand...
Most people never post at all, there are thousands of lurkers. The idiot trolls have no filter or fear of making fools of themselves, so they happily pound away at their keyboards.
Just ignore the pathetic attention seekers, and focus on the good content! They just want a reaction, and giving it to them reinforces their behavior.
 
S

SBC

AzB Silver Member
Silver Member
Sheldon said:
Most people never post at all, there are thousands of lurkers. The idiot trolls have no filter or fear of making fools of themselves, so they happily pound away at their keyboards.
Just ignore the pathetic attention seekers, and focus on the good content! They just want a reaction, and giving it to them reinforces their behavior.
Click to expand...
The good content was 15 years ago....
 
Texas Carom Club

Texas Carom Club

9ball did to billiards what hiphop did to america
Silver Member
SmoothStroke said:
And this is why I don't post often. It's obvious none of you completed 7 years of high school.
There isn't one of you who can insert a round ball in an oval peg.
You all get the 7 out on a heated billiard table with somewhat round balls.
Click to expand...
You play 9ball on a carom table?
Talk about stalling
 
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R

Rickhem

AzB Silver Member
Silver Member
nataddrho said:
A sphere was created out of pure silicon-28 in 2011 to help redefine the kilogram in terms of Planck's constant and Avogadro's number, and not the other way around. The precise number of atoms can be calculated by carefully measuring the surface area of the sphere.

The sphere is so round, that if it were the size of the Earth (assuming radius at equator), the height between the highest mountain and lowest valley would be 4.6 feet.

For comparison, a standard Aramith pool ball with +/- 0.05mm deviation would have mountains and valleys 18,300 feet high and deep. Mount Everest is 29,032 feet high.

The silicon sphere is approximately 8,000 times rounder than a pool ball.

90% of chalk dust is estimated to be 5um in diameter or less, which is 6000 feet in diameter, or 1.13 miles, in Earth scale. A wool cloth fiber would be 4.5 miles in diameter, almost twice as big as Manhattan.

A 6 foot tall man would be 70,000 miles tall if a chalk particle was the size of Earth. That is one third of the distance from here to the moon.

View attachment 751589

M.C. Escher would be impressed.
Click to expand...
The primary mirror on the Hubble space telescope was polished to a level where that same comparison of expanding it to earth size would result in a difference between the high and low spots being only six inches. The Hubble mirror is 7.9 feet in diameter, which is orders of magnitude more in surface area than the sphere, but I'm guessing the shapes pose their own set of complications. And we all know what happened when the Hubble was first deployed.

This stuff is very interesting to me, so thanks for posting!
 
sammylane12

sammylane12

AzB Silver Member
Silver Member
nataddrho said:
A sphere was created out of pure silicon-28 in 2011 to help redefine the kilogram in terms of Planck's constant and Avogadro's number, and not the other way around. The precise number of atoms can be calculated by carefully measuring the surface area of the sphere.

The sphere is so round, that if it were the size of the Earth (assuming radius at equator), the height between the highest mountain and lowest valley would be 4.6 feet.

For comparison, a standard Aramith pool ball with +/- 0.05mm deviation would have mountains and valleys 18,300 feet high and deep. Mount Everest is 29,032 feet high.

The silicon sphere is approximately 8,000 times rounder than a pool ball.

90% of chalk dust is estimated to be 5um in diameter or less, which is 6000 feet in diameter, or 1.13 miles, in Earth scale. A wool cloth fiber would be 4.5 miles in diameter, almost twice as big as Manhattan.

A 6 foot tall man would be 70,000 miles tall if a chalk particle was the size of Earth. That is one third of the distance from here to the moon.

View attachment 751589

M.C. Escher would be impressed.
Click to expand...
Holy shit.
 
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