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An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.
Toilet Replacement: For the third and final challenge of the episode, the teams each have an hour (except for the Green Team, who have an extra 10 minutes) to remove the toilets from their cabins, and replace them with new ones. As an added challenge, one member of the team must remove the old toilet, and then the other must install the new ...