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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]
The new-shaped ball was so quickly accepted that the National Football League of Australia eventually used the size and shape as standard. Sherrin began production in 1897 in a workshop in Collingwood , which had produced a variety of leather sporting goods since 1880, including footballs, cricket balls, boxing gloves and punching balls.
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 ...
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 ...
Planck length; typical scale of hypothetical loop quantum gravity or size of a hypothetical string and of branes; according to string theory, lengths smaller than this do not make any physical sense. [1] Quantum foam is thought to exist at this scale. 10 −24: 1 yoctometer 142 ym Effective cross section radius of 1 MeV neutrinos [2] 10 −21
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).
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
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.