TRVONG THPT NANG KIIIEU BAI HOC TAN TAO DE CHINH THfrC Ki THI TUYEN SINH LOP 10 NAM HOC 2014-2015 MON THI : VAT Li (CHUYEN) NGAY THI : 13/06/2014 THen GIAN : 150 phut (khong ke then gian phat de) Cau : (1,0 diem) MOt nguoi di xe dap tren mot doan duerng thang MN Tren 1/3 doan dtrOng dau di vai van toe 15km/h,, 1/3 doan dugng,tiep di vai van toe 10km/h HOi clop dtreng cuoi ngtr6i dO di vai van toe bang bao nhieu de van toc trung binh tren ca doan throng MN bang 8,18km/h ? Cau : (2,0 diem) Bep dien not vai hieu dien the U = 120V c6 ding sudt P = 600W doge dung de dun s8i lit mac tir 20°C den 100°C, hieu sudt bep la 80% Biet nu& c6 kh6i luting rieng la D = 1000kg/m3 va nhiet dung rieng c = 4200J/kg.K a) Tim theti gian dun soi mac va tinh dien nang lieu thu theo kWh ? b) Day bep dien c6 doting kinh d1 = 0,2mm, dien tra sudt p = 4.10-7S2m qudn teen 6ng hinh tru bang sir diramg kinh d2 = 2cm Tinh s6 \long day bep dien ? Cau : (1,0 diem) MOt nguoi den ben xe but cham 15 phut sau xe but cid thi ben A, nguoi d6 ben di taxi du6i theo de kip len xe but ben B ke tiep Taxi dui kip xe but no da di doge 3/4 quang direyng tir A den B Hoi nguoi phai dgi xe but a ben B bao lau ? Gia sir hai xe chuyen &Ong thang deu Cau : (2,0 diem) MCA thdu kinh hOi to co tieu cu 20cm Vat sang AB dOt vuong gOc vai true chinh, A Want tren true chinh va each thau kinh 30cm a) Ditng cac phep tinh hinh hoc, tinh khoang each tir anh A'B' den thdu kinh va tinh ti so A' B ' /AB b) Giu nguyen vi tri A ctia vat va thau kinh, nghieng vat sang AB hop vai F • true chinh mot gOc 30° nhu hinh ye ve 30° hinh tim anh A'B' va xac dinh goc hop bgi anh A'B' vai true chinh cua thdu kinh? Cau : (1,0 diem) DOA vao hai dau cuOn so cap cua mot may bien the li tuang (b6 qua hao phi) mot hieu dien the xoay chieu U1 thi hieu dien the a hai dau cuOn thir cap la 15V cuOn thir cap, neu giam bat n \Tong day thi hieu dien the gitra hai dau ctia no la U, neu tang them n vOng day thi hieu dien the dO la 2U Neu tang them 3n yang day a cuOn thir cap thi hieu dien the gifra hai dau cua cuOn bang bao nhieu ? R A = R4 Cho mach dien nhu hinh ve Biet R3 Cau : (2,0 diem) Neu not hai dal AB vao hieu dien the 120V thi cuong dO &rig R.3 dien qua R2 la 2A va UcD = 30V N'eu not hai dau CD vao hieu dien the 120V thi UAB = 20V Tinh gia tri cua mai dien tr6 ? Can : (1,0 diem) 1\AM mau hop kim g6m yang va bac Hay neu phuong an xac dinh luting cua yang mAu hgp kim tren vai cac dung cu sau : MOt luc ke, mot chau nuac, mot gia treo luc ke va day treo Biet Idled luting rieng cua yang, bac va nu& lan lugt la Dv, DB va DN - Het -