AND THEY DO SO IN ORDER TO DETERMINE THE SIZE OF EACH OTHER. A PEREZ OF THE BACK OF THE RUG DETERMINES ITS LENGTH WITHOUT TRACTION ON THE SMOOTH SURFACE, AND ACTS SIMILARLY FOR OTHER PEREZS AND MEASURE THE OVERALL LENGTH, MEASURING THE TOTAL NUMBER OF PEREZS WITH A ACCURACY OF 10 MG OF WEIGHT AND LENGTHS OF THE PEREZS WITH 10-METER LENGTH OF THE WEIGHT AND LENGTH OF THE PEREZS CAREFULLY MEASURED BY THE LENGTH OF THE WEIGHT AND LENGTH OF THE W=4M IN THE SYSTEM