During the May Day Golden Week, Zheng Zheng and her mother traveled to Wuxi and bought a teapot in Yixing. As shown in the picture, she heard that Yixing teapot is made of Yixing's unique mud.

(1) "Put the teapot lid into the overflow cup filled with water and measure the quality of the overflow water" The purpose of this is to find out the volume of boiling water by using the density of water, that is, the volume of the teapot lid;

(2) The volume of spilled water is the volume of the pot cover; V cover =V water = m water ρ water =14.4g1g/cm3 =14.8cm3;

The density of this material is ρ pot = m pot v pot = 44.4g14.8cm3 = 3.0g/cm3 = 3.0x103kg/m3;

(3) The volume of materials used in this teapot is V pot = mρ =159g3.0g/cm3 = 53cm3 = 5.3x10-5m3.

So the answer is: (1) Find the volume of the cover; b；

(2) The density of this material is 3.0×103 kg/m3;

(3) If the measured mass of the whole empty teapot is 159g, the volume of materials used in the teapot is 5.3x10-5m3.