Ôn tập củng cố kiến thức vật lý 9

530.076 NGUYEN THI NGOC MAI o CUNG CO KIEN THUC TAI LIEU ON THI VAO L(3P 10 - VIETTHEO CHUAN KIEN THQC, KT NANG NGUYiN THI NGOC MAI 5^0,076 ON TAP, CUNG CO KIEN THLTC VAT it TAI LIEU ON THI VAO LOP 10 VIET THEO CHUAN KIEN THQC, KI NANG (Tdi ban Idn thii hai) THU VIENTINHBINHTHUAN if?\/L A3 NHA XUAT BAN GIAO DUG VIET NAM [...]... a 14°C T i n h kho'i l i i d n g n h o m va thiec CO t r o n g hdp k i m Cho n h i e t d u n g r i e n g cua n h o m , nUdc, thiec I a n lifdt l a c i = 90 0 J/(kg.K), C2 = 4200 J/(kg.K), C3 = 230 J/(kg.K) (DS : mg = 0,031 k g ; m4 = 0,1 69 kg) 14 9 Co hai binh each nhiet B i n h 1 chijfa m j = 2 kg nifdc d t^ = 20°C, binh 2 chiia m2 = 4 kg nxldc ci t2 = 60°C Dau tien ngUdi ta rot mot phan nxidc m t... phang nhif H i n h 1.8 Hay diing hinh ve de xac dinh khoang khong gian can dat mat de cd the n h i n h thay anh S' ciia S •S Hinh 1.8 8 Hinh 1 .9 Xac dinh tren hinh ve anh A'B' cua vat A B ( H i n h 1 .9) va vung dat mat de nhin thay anh do r'Hi; V!ENT!MHBiHHTHUAM 17 9 Cho h a i gvfdng p h A n g song song nam ngang, m a t p h a n xa h u d n g vao n h a u C h i e u t i a s a n g S I l e n gifdng G j H a... sau k h i can hkng nhiet, ngUdi ta l a i rot mot liJdng nildc m n h u the t\i b i n h 2 sang b i n h 1 Nhiet do can bSng d binh 1 luc nay la t'l = 21 ,95 °C a) Tinh lUdng nxidc m trong moi Ian rot va nhiet do can hkng cua binh 2 (DS - m = 100 g ; t'g = 59 C) b) Neu tiep tuc thiJc hien Ian hai, t i m nhiet do can bang cua moi binh {DS : t,h = 23,76''C) 10 Mot bep dau dun 1 l i t niidc dUng trong am nhom... den 2 la bao nhieu ? {DS b) 3 V) • 12 Co nam nguon dien loai : 1,5 V ; 3 V ; 6 V ; 9 V ; 12 V va hai bong den giong nhau deu c6 ghi 3 V C^n mic no'i tiep hai bong den nay vao mot trong nam nguon dien tren Diing nguon dien nao la phu hdp nhat ? V i sao ? (DS : Nguon dien 6 V) 21 B - ON TAP VA CONG cd KIEN THUC VAT LI 9 I - D I E N HOC 1 D i e n trd cua day dan a) D i e n t r d ciia day d&n b i e u t... mach dien hieu dien the khong doi bang 9 V, c6 mac no'i tiep hai day dan dien trci = 5 Q va R2 Ngifdi ta do diicic cutting do dong dien qua mach la 0,3 A Neu mac them mot day dan dien trci R3 song song v6i day d i n dien trb R2, t h i 3 T i n h dien trd Kg 2 T i n h cong suat dong dien trong doan mach A B 1 cUdng do dong dien qua doan mach bang 0,6 A T i n h R3 Bai 9 Giuta hai diem A, B hieu dien the... biet von ke c6 dien trcl Ry, ampe ke CO dien trd R^ Hieu dien the U ^ B khong doi Trong each mfic 1, so'chi von ke'la U y i = H V , ciia ampe la I ^ i = 0,2 A Trong each mac 2, so' chi von ke la Uv2 ~ 9, 9 V, ciia ampe la I ^2 = 0,22 A Trong each mSc 2, neu ta thay R bang R' c6 gia t r i Idn hdn R t h i so chi cua 2 T i n h R 1 von ke V va ampe ke A tang hay giam so vdi gia t r i ban dau ? Cach 1 Cach... cung mot dieu kien t h i sau bao lau nUdc soi ? Cho nhiet dung rieng cua nUdc va nhom Ian liidt la Cj = 4200 J/(kg.K), C2 = 880 J/(kg.K) Biet rang nhiet do bep dau cung cap mot each deu dan (DS ; t = 19, 4 phut) III - QUANG H O C 1 Nhan biet anh sang - Ta nhan biet dUde anh sang k h i eo anh sang truyen vao mat ta Vi du : Ta n h i n thay bong hoa mau do v i c6 anh sang mau do t i i bong hoa den mat ta... i e6 kh6'i lu:dng r i e n g l a = 11300 k g / m ^ K h i t h a k h o i g6 vao nUde t h i ngUdi t a t h a y mxic nxidc b a n g v d i m a t t r e n cua kho'i go T i m do sau A h ? (DS : A h = 5,5 em) 11 9 M o t t a u t h u y b i c h i m , nu6c t r a n vao t a t ca cac k h o a n g r o n g cua t a u De dUa t a u l e n m a t nU6c, n g i f d i t a g&n vao t a u m ot so' phao va bdm day khong k h i vao phao... dong t h i no t a c h dong r a k h o i d u n g d i c h , tao t h a n h Idp dong b a m t r e n t h o i t h a n noi v6i cue a m LTng d u n g : M a d i e n de cho'ng g i , l a m dep do d u n g , m a y moc 19 V 1 e) Tdc dung sink li : D o n g d i e n qua cd t h e ngUdi c6 t h e gay co giat, t i m n g t t n g dap, n g a t t h d , t h a n k i n h b i te Uet, L / n g d u n g : T r o n g Y hoc, ngUdi t a d u... Ampe ke A chi I = 1 A, ampe ke Ax chi I j = 0,5 A, ampe ke A2 c.hi I2 bao nhieu ? c) Neu thao mot trong hai den t h i bong den con l a i c6 sang khong ? {DS : b) I2 = 0,5 A ; c) Van sang binh thifdng) 9 Ve sd do mach dien c6 nguon dien gom ba pin mic noi tiep, bong den, cong tkc dong, ampe ke do cifdng do dong dien chay qua bong den, von ke do hieu dien the gifla hai dau bong den Dung miii ten xac dinh . 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