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  2. Volume of an n-ball - Wikipedia

    en.wikipedia.org/wiki/Volume_of_an_n-ball

    Volumes of balls in dimensions 0 through 25; unit ball in red. In geometry, a ball is a region in a space comprising all points within a fixed distance, called the radius, from a given point; that is, it is the region enclosed by a sphere or hypersphere. An n-ball is a ball in an n-dimensional Euclidean space.

  3. Spaldeen - Wikipedia

    en.wikipedia.org/wiki/Spaldeen

    Modern-day Spaldeen. A Spalding Hi-Bounce Ball, often called a Spaldeen or a Pensie Pinkie, is a rubber ball, described as a tennis ball core without the felt. [1] These balls are commonly used in street games developed in the mid-20th century, such as Chinese handball (a variation on American handball), Australian Handball, stoop ball, hit-the-penny (involving trying to make a penny flip on a ...

  4. 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 ...

  5. Adidas Telstar 18 - Wikipedia

    en.wikipedia.org/wiki/Adidas_Telstar_18

    The Adidas Telstar 18 was the official match ball of the 2018 FIFA World Cup, which was held in the Russian Federation.It was designed by the company Adidas, a FIFA Partner and FIFA World Cup official match ball supplier since 1970, and based on the concept of the first Adidas's World Cup match ball. [2]

  6. Orders of magnitude (length) - Wikipedia

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

    4.3 cm – minimum diameter of a golf ball [114] 5 cm – usual diameter of a chicken egg; 5 cm – height of a hummingbird, the smallest-known bird; 5.08 cm – 2 inches, 5.5 × 5.5 × 5.5 cm – dimensions of a 3x3x3 Rubik's cube; 6.1 cm – average height of an apple; 7.3–7.5 cm – diameter of a baseball [28]

  7. List of FIFA World Cup official match balls - Wikipedia

    en.wikipedia.org/wiki/List_of_FIFA_World_Cup...

    Telstar was the first 32-panel black-and-white ball used in the FIFA World Cup finals. Only 20 were supplied by Adidas. A brown ball (Germany-Peru) and a white ball (first half of Italy-Germany) were used in some matches. [5] [14] 1974: Telstar Durlast: The first polyurethane coated ball, making it waterproof and resistant to wear and tear. [5 ...

  8. Basketball (ball) - Wikipedia

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

    A typical basketball. A basketball is a spherical ball used in basketball games. Basketballs usually range in size from very small promotional items that are only a few inches (some centimeters) in diameter to extra large balls nearly 2 feet (60 cm) in diameter used in training exercises.

  9. 16-inch softball - Wikipedia

    en.wikipedia.org/wiki/16-inch_softball

    16-inch softball (sometimes called clincher, mushball, [1] cabbageball, [2] [3] puffball, blooperball, smushball, [4] and Chicago ball [5] [6]) is a variant of softball, but using a larger ball that gradually becomes softer the more the ball is hit, and played with no gloves or mitts on the fielders.