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www.reference.com/article/pool-ball-made-bfd5846d35ebce52

Many pool balls are made of phenolic resin, a material that is heated until it becomes hardened, while others are made from polymer or polyester. Phenolic resin pool balls are designed to absorb the impact of a pool cue hitting the ball.

www.reference.com/article/two-shots-black-ball-eight-ball-pool-aac0a330a527b219

A player may not take two successive shots at sinking the eight ball. If the first shot does not end the game, play rotates to the other shooter and the player must wait his turn before a second attempt is taken.

www.reference.com/article/correct-rack-eight-ball-pool-94c182c7637cec1a

For the correct eight-ball rack, arrange all 15 play balls tightly in the triangle with the eight ball in position directly below the ball at the triangle's apex and with one solid and one striped ball at each corner of the triangle's base. Place the other balls randomly.

www.reference.com/science/blood-pooling-d00c76340069bd8

Blood pooling occurs when the walls and valves of veins in human legs do not work effectively, thereby making it difficult for blood to return to the heart, according to Cleveland Clinic. This condition, known as chronic venous insufficiency, causes blood to pool in veins, a condition called stasis.

www.reference.com/article/play-8-ball-pool-pc-a1a3e915628f27c0

Visit MiniClip.com to access 8 Ball Pool, a free multi-player online game. MSN.com offers a free game called Quick Fire Pool 8 Ball that is available to play within the gaming section of the website.

www.reference.com/article/pool-green-aef6d7c83b3c85e9

Green water in a swimming pool or hot tub is caused by green algae, which develops due to poor water circulation, lack of proper cleaning, poor sanitation practices or low pH levels. Such conditions can cause green algae blooms to take over a pool within days or even hours.

www.reference.com/article/8-ball-pool-miniclip-85fa33a501b0032

Miniclip's "8 Ball Pool" is an online game hosted at the Miniclip website. The game is multiplayer-only, requiring the player to be online and play in one-on-one matches or eight-person tournaments against other players.

www.reference.com/article/american-rules-pool-ee4d2474ed0cc794

The game of pool has no official American rules, as multiple organizations such as the Billiard Congress of America and the American Poolplayers Association offer competing rule sets, as of 2015. The game is generally played on a rectangular table with six pockets, four on the corners and two on the

www.reference.com/article/retailers-offer-snooker-pool-tables-sale-7b4fcfe9ad888611

Retailers that sell snookers tables include Pool Table Plans and Robbie's Billiards, Home & Patio and Golden West Billiards Mfg. Customers may shop the PoolTablePlans.com website or visit the company's showroom in St. Louis, Missouri.

www.reference.com/world-view/many-gallons-pool-f705582183cb0362

The amount of gallons of water in a pool varies greatly depending on the size of the pool. The average in-ground backyard pool holds between 18,000 and 20,000 gallons of water.