Laboratory centrifuge. A laboratory centrifuge is a piece of laboratory equipment, driven by a motor, which spins liquid samples at high speed. There are various types of centrifuges, depending on the size and the sample capacity.
In American football, each team is allowed 11 men on the field during a play, for a total of 22 players plus the officials.  If there are more than 11 players on the field foâ¦r a play, the team with too many players may be assessed a 5-yard penalty and any play that occurred may be nullified (at the discretion of the opposing team).
Best Answer: Field and Players (American Football) The American football field is often called the gridiron because the markings on the field resemble a grill. The game is played on a rectangular field 120 yards (110 metres) long by 53 1/3 yards (49 metres) wide. The longer boundary lines are sidelines, while the shorter boundary lines are end lines.