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
Very big. Billiards and the pocket billiards games have many millions of players worldwide and in many countries. In the US alone, there are over 32 million pool and billiards players. With tournaments, leagues, pool halls and the equipment it is a many billion dollar industry.
On average, the balls are 2.25 inches in diameter and all balls weigh 5.5 oz except for the cue, which weighs 6 oz.
Viper1
This depends upon what game and where you are playing.
In the US, the maximum diameter allowed for a pocket billiards ball is 2.255 inches.
There are a few sizes of balls.
Full size snooker balls are 2 1/16" (52.5mm) in diameter.
For pocket billiards under BCA and APA rules, each must be 5 1/2 to 6 ounces and 2 1/4 inches in diameter.
In the US, a billiard ball weighs 5.5 to 6 ounces at sea level.
In the US the diameter of a billiard ball is 2 1/4 inches.
The Billiard Ball was created in 1967.
work.
Friction between the ball and cloth.
Friction between the ball and cloth.
The Billiard Ball Model is John Dalton's idea of what an atom looks like.
The word is spelled billiard, just as you spelled it. The billiard ball rolled smoothly to the corner pocket.
A billiard ball.
The billiard ball atom model was proposed by John Dalton.
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.
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.
the Billiard Ball Model.
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.