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2. Bowling ball - Wikipedia

   en.wikipedia.org/wiki/Bowling_ball

   The USBC and World Bowling promulgate bowling ball specifications. USBC specifications include physical requirements for weight (≤16 pounds (7.3 kg)), diameter (8.500 inches (21.59 cm)—8.595 inches (21.83 cm)), surface hardness, surface roughness, hole drilling limitations (example: a single balance hole including the thumb hole for "two-handed" bowlers [3]), balance, plug limitations, and ...

3. Basketball (ball) - Wikipedia

   en.wikipedia.org/wiki/Basketball_(ball)

   750–770 mm 29.5–30.3 in [4] 580–620 g 20–22 oz [4] Men and boys ages 15 and up. This is the official size for men's high school, college, and professional. 6: Women: 715–730 mm 28.1–28.7 in [4] 510–550 g 18–19 oz [4] Boys ages 12–14. Women and girls ages 12 and up. This is the official size for women's high school, college ...

4. Ball (association football) - Wikipedia

   en.wikipedia.org/wiki/Ball_(association_football)

   Regulation size and weight for a football is a circumference of 68–70 cm (27–28 in) and a weight of 410–450 g (14–16 oz). The ball is inflated to a pressure of 0.6–1.1 bars (8.7–16.0 psi) at sea level. [20] This is known as "Size 5". Smaller balls, Sizes 1, 3, and 4, are also produced for younger players or as training tools. [20]

5. Football (ball) - Wikipedia

   en.wikipedia.org/wiki/Football_(ball)

   The football used in rugby league is known as "international size" or "size 5" and is approximately 27 cm (11 in) long and 60 cm (24 in) in circumference at its widest point. Smaller-sized balls are used for junior versions of the game, such as "Mini" and "Mod". A full size ball weighs between 383 and 440 g (13.5 and 15.5 oz).

6. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   2.100 Mm – length of proposed Iran-Pakistan-India gas pipe; 2.100 Mm – distance from Casablanca to Rome; 2.288 Mm – length of the official Alaska Highway when it was built in the 1940s [161] 3.069 Mm – length of Interstate 95 (from Houlton, Maine, to Miami, Florida) 3.846 Mm – length of U.S. Route 1 (from Fort Kent, Maine, to Key West ...

7. Minié ball - Wikipedia

   en.wikipedia.org/wiki/Minié_ball

   The Minié ball, or Minie ball, is a type of hollow-based bullet designed by Claude-Étienne Minié for muzzle-loaded, rifled muskets. Invented in 1846 shortly followed by the Minié rifle , the Minié ball came to prominence during the Crimean War [ 1 ] and the American Civil War where it was found to inflict significantly more serious wounds ...

8. Sliotar - Wikipedia

   en.wikipedia.org/wiki/Sliotar

   The diameter is between 69 and 72 mm (2.7 and 2.8 in) not including the rib [4] The mass is between 110 and 120 g (3.9 and 4.2 oz) The rib height is between 2 mm and 2.8 mm, and width between 3.6 mm and 5.4 mm; The leather cover can be between 1.8 mm and 2.7 mm and is laminated with a coating of no more than 0.15 mm

9. Tennis ball - Wikipedia

   en.wikipedia.org/wiki/Tennis_ball

   This is an accepted version of this page This is the latest accepted revision, reviewed on 5 February 2025. Ball used in the sport of tennis Tennis balls at the 2012 French Open A tennis ball is a small, hollow ball used in games of tennis and real tennis. Tennis balls are fluorescent yellow in professional competitions, but in recreational play other colors are also used. Tennis balls are ...