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The balls are round, made of leather or other suitable materials, and are usually made of 12 pieces of black pentagonal fabric and 20 pieces of regular hexagonal fabric. The circumference of the sphere shall not exceed 70 cm (28 inches) and shall not be less than 68 cm (27 inches). The weight of the ball, at the start of the game, must not exceed 450 grams (16 ounces) and must not be less than 410 grams (14 ounces).
The air pressure of the ball, at sea level, is to atmospheric pressure (600 grams to 1100 grams per square centimeter to pounds per square inch). Replacement of a substandard ball If, during a match, the ball breaks or is substandard: Play is stopped.
Replace the standard ball, and at the point where the ball breaks, the falling ball restarts the game. If the ball is in the goal area at that time, the place where the ball falls is on the goal area line parallel to the goal line, closest to the position of the ball at the time the play was stopped. If the ball is broken or out of standard if it is not in play, such as a half-time kick-off, goal kick, corner, free kick, penalty kick or throw
Restart the game according to the rules. During the game time, the match ball cannot be changed without the consent of the referee.
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How big a football should be, it should be that the circumference of the ball should not be more than 71 cm or less than 68 cm. The weight of the ball, which must not be more than 453 grams or less than 396 grams at the start of the game.
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Adidas uses a specially developed electronic circumferential measuring machine that will be used to measure the circumference of the sphere. The target is accurate to 690mm, and any ball between 685mm and 695mm can be recognized.
Weight: 265g
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1. Measuring diameter method:
The diameter of the soccer ball is measured, the radius r is calculated, and the volume v<> is calculated using the formula
2. Drainage measurement method.
Slowly place the soccer ball in a container filled with water until it is completely submerged, and collect the spilled water.
Use a measuring cup to directly measure the volume of spilled water, which is the volume of a football.
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A soccer ball is a sphere, and the volume of the sphere can be calculated by knowing the radius or diameter. The volume of the sphere is equal to the cubic multiplied by the radius. Or know that the surface area of a football can also be counted. Count the number of squares on the surface of the soccer ball, calculate the surface area, and then calculate the radius, and then the volume.
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v=(4/3)πr³According to this formula, the volume of the football can be calculated. among othersris the radius of the ballis pi, which is approximately equal to.
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The volume of a soccer ball can be calculated using the volume of the sphere to 4 3 (to the 3rd power of r), and the diameter of the ball is calculated by using a clamp to obtain the radius of the ball.
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How do you calculate football volume? 1. Measuring diameter method: measure the diameter of the football, calculate the radius r, use the formula to calculate the volume v2, and slowly put the football into a container filled with water until it is completely submerged, and collect the overflowing water.
Use a measuring cup to directly measure the volume of spilled water, which is the volume of a football.
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The volume of the earth is about 10,832 times 10 times 18 cubic meters, and the standard No. 5 football is a cubic centimeter rolling, so the volume of the earth is approximately about the volume of the football multiplied by 10 to the 22nd power, that is, nearly 1,760 billion times! The landlord will give me a big ode!
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The volume of a soccer ball is about 685 695 cubic centimeters.
The weight is 265g and the circumference of the football must not be more than 71 cm or less than 68 cm. When the ball is inflated, its pressure should be one atmosphere. It is made of leather or other suitable materials, usually 12 pieces of black pentagonal fabric and 20 pieces of regular hexagonal fabric.
Sphere circumference:
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The rules of football are as follows: 1. Goal kick 1, when a player kicks the ball from the air or the ground out of the opponent's goal line (not a goal score), the opponent kicks the goal kick at any point in the goal area. When kicking a goal kick, the opposing player should exit the penalty area. >>>More
soccer。
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