[填空题]
A potter’s wheel is rotating around a vertical axk4-rr,vo j tfi 808o2yhiwq3iis t,kwt 9;zl;xbfhrough its center at a frequency of 1.5rev/s Thw;f;l t,zxk 9be 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 sticks to it? $rev/s$