Litell, Mifflin. Integrated Mathematics. Evanston, IL: 1995.

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"Ball (tennis), Diam. 6.5cm, 57g, hollow interior construction and also a cloth covered exterior construction"57g
Tennis. Americana Online."The ball is a cloth-covered rubber sphere that is normally yellow in color, around 2½ customs (6.35cm) in diameter and 2 ounces (56.69 grams) in weight"56.69g
Sports A come Z: Tennis: Equipment. United claims Olympic Committee."A tennis ball is hollow and composed of inflated rubber covered with a fabric. That is between 2½"and 25/8"(6.35 and also 6.67cm) in diameter and also weighs between 2 and 21/16 ounces (57.7 and 58.5 grams)."56.7–58.5g
New Encyclopedia Britannica. 15th ed. 1997."The ITF states that the ball should be in between 2½ inches (6.35cm) and 2 5/8 inches in diameter and between two ounces (56.7g) and also 2 1/16 ounces in weight"56.7g
World publication Encyclopedia. Chicago: world Book, 1998."It should weigh more than 2 ounces (56.7 grams) yet less 보다 2 1/16 ounces in weight"56.7–58.5g

Tennis is an the end or indoor game, which is played on a rectangle-shaped court by 2 persons (known as singles) or by four persons (doubles). Rackets are used to fight the ball back and forth throughout a net. The object of the video game is to score points by to mark the round in a method that an foe can not effectively return it. The beginnings of the game dates back to the rock Age, when humans very first used their clubs to hit rocks earlier and forth across barricades that dirt and stone. The tennis court is 78feet (23.8meters) long, and also its divided into equal sides through a net that stands 3feet (0.9meters) high in ~ the facility of the court. Because that singles, the court is 27feet (8.2meters) wide. Because that doubles the width is enhanced to 36feet (11meters). A tennis sphere is hollow and also composed of inflated rubber, extended with a towel which need to be uniform. Its in between 2½ and also 25/8inches (6.35 and also 6.67cm) in diameter and weighs between 2 and 21/16 ounces (57.7 and also 58.5 grams). Yellow and also white balls are supplied in competition. When dropped ~ above concrete from a height of 100 inch (2.5meters), they should bounce upward from 53 to 56 inch (135 come 147 centimeters). The serve is the most essential stroke in tennis. There are no weight limitations on the racket and also it is typically strung with resilient gut or nylon. The surface of the court may be grass, clay, or some type of difficult material which is normally concrete, asphalt, fabricated turf, or wood. The court surface ar is vital element in tennis because balls bounce higher or lower, faster or slower, relying on the surface they strike. Over there is a tendency to slide on clay when harder surface are best for rapid starts and stops.

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