[填空题]
A potter’s wheel is rotating around a vertical axi ,.hcp3rrl6t 9d gfez6s.yz1e78, ol0b pco per29vy nq through its center at a frequency of 1.5rev/s The wheel can be considered a uniform disk of mass 5.0 kg and diameter 0.40 m. The potter then throws a 3.1-kg chunk of clay, approximately shaped as a flat disk of radius 8.0 cm, onto the center of the rotating wheel. What is the frequency of the wheel after the clay sticl7cn.z epv 0o,ry1pey 8bo29 qks to it? $rev/s$