Aimant Boule de football

according to the second law of football the ball has to: - be a sphere filled with air - have a circumference of 68-70 cm (27-28 in) - weight about 410-450 g (14-16 oz) - be inflation ated to a pressure of 0.6 to 1.1 atmosphère (59-108 kPa or 8.6-15.7 psi) Most modern stitched from 32 panels of waterproofed leather or plastic (12 pentagones regular pentagones et 20 regular hexagones).