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1929 drawing of grandfather, grandmother, and Kolobok by artist Конончук Сергій Пилипович, Kononchuk Serhii Pylypovych (1912—1941) Kolobok is translated from Ukrainian as "small round bun", [8] or from Russian as round dough, [7] though it has also been thought to reference the Eastern European Bread, kalach, [2] or possibly a round palt (based on the Swedish food item ...
Ball of wax example, also known as the wax argument, a thought experiment by René Descartes in his Meditations on First Philosophy; Boule de Genève (Geneva ball), a type of pendant watch in the shape of a small ball; Times Square Ball or the Ball; Round shot or cannonball or ball, a round projectile fired from guns and cannons
In particular, a ball (open or closed) always includes p itself, since the definition requires r > 0. A unit ball (open or closed) is a ball of radius 1. A ball in a general metric space need not be round. For example, a ball in real coordinate space under the Chebyshev distance is a hypercube, and a ball under the taxicab distance is a cross ...
The name, derived from an old English practice of bore measurements in gun-making which refers to a nominally 4-gauge bore, that is, a bore diameter that would accommodate a pure lead round ball weighing 1 ⁄ 4 of a pound. This would imply a bore diameter of 1.052-inch (26.7 mm), however in practice the bore diameter varied greatly as, in ...
In games where a ball may be legally caught (e.g. baseball) or carried (e.g. American football), a player (or the player's team) may be penalized for dropping the ball; for example, an American football player who drops a ball ("fumbles") risks having the ball recovered and carried by the other team; in baseball, a player who drops a thrown or ...
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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]