kiem tra hoc ky 2 2017 khoi 12 de so 1

... 0,5kg t1 = 900C t2 = 20 0C Qnc = ? t = ? GII Nhit lng nhụm ta l : QNhụm = mnhụm.Cnhụm tnhụm = 0,5 .88 0.(90 20 ) = 0,5 88 0.70 = 3 080 0 (J) Theo phng trỡnh cõn bng nhit Qnc = QNhụm = 3 080 0 (J) Nhit ... thờm l Qnc = mnc.Cnc tnc 3 080 0 = 0,5. 420 0 tnc tnc = Qnuoc 3 080 0 = = 14, 67 C mnuoc Cnuoc 0,5. 420 0 ỏp s Qnc =3 080 0J; tnc = 14,670C (0 ,25 im) (0 ,25 im) (0 ,25 im) (0 ,25 im) (0,...

Ngày tải lên: 12/06/2015, 20:00

... S im ( 4) 2( 6) 3(15) 3(15) TS cõu hi 2( 4) (6) 1(5 ) (5) (15) (15) TS im 1,0 2, 0 1,0 3,0 PHềNG GD-T TP.NG HI TRNG THCS HI THNH 3,0 10,0 100% KIM TRA HC K Nm hc: 20 10 -20 11 Mụn : Vt lý Thi gian ... thit: Q = c.m(t2 - t1) (0,5 im) Thay s tớnh c: Q = 420 000J (1,0 im) Cõu 10.(3) TểM TT (0,5 im) Cnc= 420 0 J/kg.K Cng = 380 J/kg.K mnc= 500g = 0,5 kg mng = 0,5kg t1 = 80 0C t2 = 20 0C...

Ngày tải lên: 12/06/2015, 20:00

... How……………………………………………………………… II Write a passage about Lan basing these prompts (1. 5 pts) name/ Lan she/ 14 she/ 40 kg and 1m 45 cm favorite foods/ chicken and fish she/ enjoy/ read books she/ go to ... height C - What tall D - How tall 10 She is fat and ………………… is her mother A - neither B - either C - so D - too III Supply the correct form of the verbs given (1pt) He has a toothache He shou...

Ngày tải lên: 27/07/2015, 02:53

... the rays from the sun D we can breathe 42 Refrigeration and air-conditioning system ……… A lead to pollution B make our lives more convenient Trang Mã đề 101 C also cause danger to our lives ... knowing as the SEA Games, is a biannual multi-sport event A B involving participants from the current eleven countries of Southeast Asia C D Trang Mã đề 101 35 Although species evolve differently,...

Ngày tải lên: 07/08/2014, 16:22

Ngày tải lên: 29/01/2015, 08:00

... 357 20 C 485 20 1 32 21 D 20 9 21 A 357 21 C 485 21 1 32 22 B 20 9 22 C 357 22 C 485 22 1 32 23 C 20 9 23 C 357 23 A 485 23 1 32 24 C 20 9 24 A 357 24 B 485 24 1 32 25 A 20 9 25 C 357 25 D 485 25 Đáp án A ... 1 32 A 20 9 A 357 A 485 1 32 A 20 9 D 357 D 485 1 32 10 D 20 9 10 D 357 10 D 485 10 1 32 11 C 20 9 11 B 357 11 C 485 11 1 32 12 B 20 9 12 D 357...

Ngày tải lên: 05/08/2015, 19:50