... cua nhom, nUdc, thiec Ian lifdt la ci = 90 0 J/(kg.K), C2 = 4200 J/(kg.K), C3 = 230 J/(kg.K). (DS : mg = 0,031 kg ; m4 = 0,1 69 kg) 14 9. Co hai binh each nhiet. Binh 1 chijfa ... Hinh 1.8 Hinh 1 .9 8. Xac dinh tren hinh ve anh A'B' cua vat AB (Hinh 1 .9) va vung dat mat de nhin thay anh do. r'Hi; V!ENT!MHBiHHTHUAM 17 9. Cho hai gvfdng ... kien thifc Idp 9. Bp sach nay gom c6 nam cuon : Toan, Ngu van, Tieng Anh, Vat li, Hoa hpc. Pham vi kien thuc cua bp sach tap trung vao chuong trinh va chuan kien thuc, ki nang lop 9 do Bp Giao...