soccer ball

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football (soccer ball)

Modern football (soccer ball).

The chemistry behind a World Cup soccer ball

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soccer ball

sports equipment

Also known as: football

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football

In football: Equipment and field of play
The ball is spherical, covered with leather or some other suitable material, and inflated to a pressure equal to 0.6–1.1 atmospheres (8.5–15.6 pounds per square inch [600–1,100 grams per square cm]) at sea level; it must be 27–28 inches (68–70 cm) in circumference and 14–16 ounces…
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