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The volume of a n-ball is the Lebesgue measure of this ball, which generalizes to any dimension the usual volume of a ball in 3-dimensional space. The volume of a n -ball of radius R is R n V n , {\displaystyle R^{n}V_{n},} where V n {\displaystyle V_{n}} is the volume of the unit n -ball , the n -ball of radius 1 .
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]
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, and professional. 5
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).
In Euclidean n-space, an (open) n-ball of radius r and center x is the set of all points of distance less than r from x.A closed n-ball of radius r is the set of all points of distance less than or equal to r away from x.
Carom balls. Four-ball needs an additional object ball.. In the realm of carom billiards games, three balls are used to play most games on pocketless billiards tables.Carom balls are not numbered, and are 61–61.5 mm (approximately 2 + 13 ⁄ 32 in) in diameter, and a weight ranging between 205 and 220 grams (7.2 and 7.8 oz) with a typical weight of 210 g (7.5 oz). [10]
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 ...
Diameter Weight Pressure Bounce Material Image Basketball: FIBA: Sphere: 75-77 centimeters - 580-620 grams 1.035-1.085 meters dropped from height of 1.8 meters leather, artificial/composite/synthetic leather Bowling: IBF: Sphere 26.704–27.002 inches (67.83–68.59 cm) 8.5–8.595 inches (21.59–21.83 cm) 16 pounds (7,300 g) - non-metallic ...