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Two and a quarter inches is typical of the balls at the American "pool" halls where I go to play eight ball or nine ball. However, interestingly enough, there are quite a few ball size standards for the various billiard games around the world. Read the Wikipedia entry on the Billiard ball to learn more:
http://en.wikipedia.org/wiki/Billiard_ball
What else can I help you with?
What is the diameter of a pool ball in mm?
The diameter of a standard pool ball is 57.15 mm (2.25 inches). This size is consistent for most billiard and pool games, including eight-ball and nine-ball.
When was The Billiard Ball created?
The Billiard Ball was created in 1967.
A rolling billiard ball collides with another billiard ball The first billiard ball defined as the system stops rolling after the collision Is this heat or work?
work.
Why the momentum of a billiard ball rolling on a billiard table change?
Friction between the ball and cloth.
Why does momentum of a billiard ball rolling on a billiard table change?
Friction between the ball and cloth.
What is is billiard ball model?
The Billiard Ball Model is John Dalton's idea of what an atom looks like.
How do you spell billiard?
The word is spelled billiard, just as you spelled it. The billiard ball rolled smoothly to the corner pocket.
What is the surface of the Earth similar to?
A billiard ball.
What was Dalton's atomic model nickname?
Dalton's atomic model was often referred to as the "Billiard Ball Model" because he envisioned atoms as solid, indivisible spheres similar to billiard balls.
Why is the momentum of a billiard ball change as is rolls on a billiard table?
The answer is rather simple. Even though a billiard ball is smooth, when it rolls it imparts some of its kinetic energy to the felt covering of the table. That is, the felt heats up a bit as the ball slows down.
What the singular of billiards?
The word billiards, though plural in form, is singular in meaning. There is no such thing as a billiard. You can refer to a billiard ball or a billiard table, but in those constructions the word billiard is an adjective, not a noun.
What is a billiard stroke?
The stroke is the method for sliding the cue to strike the cue ball. A good billiard stroke is very straight and level and continues with a follow through after contact with the cue ball.
