우공비Q 과학 2 (하) 정답 및 채움해설 빠른 정답 찾기 2~4 Ⅴ. 물질의 특성 1. 물질의 특성 ⑴ 5 2. 물질의 특성 ⑵ 9 3. 혼합물의 분리 13 Ⅵ. 일과 에너지 전환 4. 일 21 5. 에너지 27 Ⅶ. 자극과 반응 6. 감각 기관 39 7. 신경계 44 8. 항상성 48 13강 일차방정식의 풀이 1
A n s w e r 4 0 0 20 13 40 13 14 1 13 14 15 16 17 20 % 13 13 5 13 2 47.0 ml 55.0 15.0 13 14 15 5.0 g/cm 1.8 kg B E A C 13 14 LNGLPGLNG LPG 15 << 13 A<B<C<D<E 14 6 13 14 15 7.5 g 3 0 13 14 15 B 16 17 18 13 A B C D E F 13 14 15 16 17 18 19 20 21 22 23 24 25 26
7 250 J J 30 J 13 14 500 W 15 2,000 W 16 30,000 W 16 J 30 J 13 2J0 0 14 15 16 17 18 7,500 W(7.5 kw) 49 J 98 J 98 J 49 J 4 13 14 196 J 2 = 13 14 15 16 17 8 b > 200 N 2.5 N 0.5 m 13 s 14 > 15 16 17 18 4N N 13 14 15 400 J = = = 13 B C D E 14 m/s 13 14 64 J 15 16 14 8 cm D14 m/s 96 J 9 48 J 20 J 4N 7J 40 N 40 N 20 N >> << == 13 = 14 15 2J 25 W 0 N 200 N 13 14 == m/s 0.96 J 13 14 13 14 15 16 17 18 19 20 21 22 23 40 J 8W 24 4m 25 4 26 0 N 27 28 29 30 0.5 m 6m 20 W 13 13 2 2 2 14 8 8 8 765000 J(765 kj) 13 14 15 72 m 2 4 ABCD 13 14 15 13
14 17 B C D E A F B A 13 14 15 16 17 18 19 A 13 14 15 16 ABC DEF B A C D E 13 14 15 AB 16 A 13 14 15 18 15 ABC A B A B C E D 13 B 14 C 15 A 16 A 13 14 15 13 14 15 AB A 13 A 14 B CD 13 14 15 16 17 18 19 20 21 22 23 CDF 24 25 C 26 27 28 29 16 8 A A C B 13
1 S T E P 1 13 14 15 16 17 ~ point 21 ABC 18 K S T E P 2 ~13 13 A B C A B AB 5
13 4æ S T E P 2 16~17 5.0 g/cm 1.8 kg B E A C 13 14 LNG LPGLNG LPG 15 5.0 g/cm = =_=0.90 g/cm _2,000 cm =1,800 g=1.8 kg 1.8 kg 2 S T E P 1 15 47.0 ml 55.0 15.0 13 14 15 ~ ~ ;1 0; 14 50.0 ml 59.0 ml-39.0 ml=20.0 ml 54 g = =2.7 g/cm 20.0 cm = =_ 0 cm g/cm 0 0 cm 6
= A~E 1g A= =1 g/ml 1 ml 4g B= =2 g/ml 2 ml 3g C= =1 g/ml 3 ml 3g D= =0.75 g/ml 4 ml 1g E= =0.25 g/ml 4 ml B E B E A C A C 14 LNG LPG LNGLPGLNG LPG 15 250 g A= =5.0 g/cm 50 cm 300 g B= =6.0 g/cm 50 cm S T E P 3 18~19 300 g C= =5.0 g/cm 60 cm 390 g D= =6.5 g/cm 60 cm A C 1 A 1 ABC A A A BCD 18 K 13 7
+ + + >> = 8
3 S T E P 1 21 78 æ 0 13 14 15 B 16 17 18 ~ 0 æ æc 78 A B C 0 A B B 78 æ C 14~15 A B B A B B B S T E P 2 22~23 13 80 æ 0 æ æc B C O A A B A B B A B>A C C>A=B 9
A B A B A B C B A B C 4 S T E P 1 25 0 0 20 13 ~ 0 g g æc 5 0 A B C - 5 9 13 55 AB AB 0æ BC S T E P 2 26~27 40 13 14 5 BC EF 80 æ AB 13
B 250 _0=25(%) 750+250 300 _0=20(%) 1,000+500 0+240 _0=36(%) 400+600 0 g g 0 % 0g = _0 20(%)= _0 200 kg 20_200 kg = =40 kg 0 =- =200 kg-40 kg=160 kg A AB 0 g g 0 g g 0 g g 60 æ 25 g g 0 g40 g 40 40 0 g 60 æ 13 14 D 50 æ 169 A _0?62.8(%) 0+169 B 0 g g %= _0 = _0 + ACE C 181 g 0 g 81 g 20 æ 81 g-27 g=54 g 0 g A
S T E P 3 28~29 20 % 13 0 æ 2 D æc B 0 C E F -20 A G AB BC 0æ CD DE EF FG AB 0æ 0æ point - 0æ BC EF CDDE EF % 1,000 g= %_g _1,000 = =0(g) 0 0 40 % 500 g= %_g 40_500 = =200(g) 0 0 0+200 _0=20(%) 20 % 1,000+500 80 æ 20 æ 80 æ 20 æ 0æ 73 13 36 28 40 æ 60 æ 60 æ 80 æ 269 g0 g 169 g 20 æ 31.6 g 169 g-31.6 g= 137.4 g
AB CD E F point 5 S T E P 1 31 13 ~ ~ 50`æC ACE A<C<E A BC DE F E>C>A 13 S T E P 2 32~33 << 13 A<B<C<D<E 14 << 13
78.3 æ 0 æ B A 64 æ0 æ 0 80 æc B D B D 13 A<B<C<D<E 14 { } A B C D 0 5 15 20 25 A B C D 14
6 S T E P 1 35 13 14 15 ~ A B 15 S T E P 2 36~37 7.5 g 15
80 æ50 g 15 g g 20 æ 50 g 18 g 2.5 g 7.5 g 7.5 g point 38~39 S T E P 3 40~41 A B C D E F 16
BC AB BC CD DE A B 0 0 æc 80 60 B 40 20 A 0 2 4 C D E 6 8 14 AB BC 78.3 æ CD DE 0 æ <<<<< A B C D E F A B C D E F 20 æ0 g 30 50 g 15 g g 17
A B C D A D B A D C 0 æ 0æ 1.0 g/cm 1.0 g/cm 42~45 13 14 15 16 17 18 19 20 21 22 23 24 25 26 ABCD 2 A 35.5 g 20.0 ml- 35.5 g 15.0 ml=5.0 ml =7.1 g/ml= 5.0 ml 7.1 g/cm 40.0 g A= =2.0 g/cm 20.0 cm 15.0 g B= =0.75 g/cm 20.0 cm.0 g C= =0.5 g/cm 20.0 cm B C A~C A C 18
A B A A B ABCDE 53 æ 53 æ < << > _ = 0 13_2,000 = =260(kg) 0 =- =2,000 kg-260 kg=1,740 kg 13 30 æ 0 g X 40 g B 0 g 0 g X 20 g X20g A =;1 4º0;_0=28.6(%) C =;1 2º0;_0=16.7(%) B D 30 æ 14 15 0 g g %= _0 = _0 + 19
16 17 18 19 20 0 æ 21 22 0 æ 23 B 250 g 60 æ 50 g D 200 g 60 æ B D 24 25 26 20
15 2,000 N_3 m = = =2,000 W 3s 7 S T E P 1 _ 16 =_=,000 N_3 m/s=30,000 W 49 S T E P 2 250 J J 30 J 13 14 500 W 15 2,000 W 16 30,000 W 0 0 N 0 0 0 0 0 =_=50 N_5 m=250 J =20 N_ m= J =15 N_2 m=30 J 1 HP 75 kg 1 1m 735 W 13 = 14 1,000 J = = =500 W 2s point N JN m W J/s HP 50~51 16 J 30 J 13 2J0 0 14 15 16 17 18 7,500 W(7.5 kw) 2 0 0 0 0 0 0 0 0 N m JJ/s W 5N 2m =5 N_2 m= J N 1m = N_1 m= J 20 N 1m =20 N_1 m=20 J =_ =< 21
3m 8 N_3 m=24 J 0 0 5m =4 N_2 m+ 2 N_1 m+3 N_2 m=16 J 16 J 0 N m 0 N_0.5 m=50 J 5 kg 9.8_5=49(N) =49 N_2 m= 98 J =F_ m=50 J F=5 N N 4 3 2 1 0 1 = 2 3 4 5 6 m 0~2 m4 N 2~3 m2 N 3~5 m3 N 5N =5 N_6 m=30 J 30 J 3m 9.8_ 20 N 5N 3m 5 N_3 m=15 J 20 N 3m 20 N_3 m=60 J 20 N 5N 3m 3m ;4!; 5N 20 J 5 N_=20 J 4m 9.8 N 5N 13 0 2J0 0 14 =_ 15 600 N m 600 N_ m=6,000 J 1 kw=1,000 W 6,000 J = = =6 1,000 W 16 = 17 1 1 1 ABC= =234 60 s 40 s 30 s 22
18 = 2,500 N_15 m = =7,500 W=7.5 kw 5s 8 S T E P 1 7,500 W7.5 kw 53 1W 1 1J 1,000 W=1 kw 300 N_0.5 m=f_1.5 m 0.5 m F=300 N_ =0 N 1.5 m _0.3 m=300 N_0.9 m =900 N = _=900 N_0.1 m=90 J 80 cm 20 cm b > 200 N 2.5 N 0.5 m 13 s 14 > 15 16 17 18 400 N_0.2 m=f_0.8 m F=0 N 20 cm 0 N_0.2 m= F=w_;bA;=600 N_ 0.5 m 1.5 m =200 N 0. m F=w_;bA;= N_ =2.5 N 0. m = 25 N_2 m=0 N_ = point 20 J 20 cm80 cm=h20 cm 20 cm h=5 cm = 50 N_s=200 N_0.1 m s=0.4 m=40 cm 0 N_a=20 N_b ab=15 41 F_4=60 N_1 =0.5 m 18 w w r r R R w_r=f_r F F F=15 N ;4!; 4 4 m_;4!;=1 m S T E P 2 54~55 4N N 13 14 15 400 J 4 cm 20 cm 2 4 cm 24 cm 23
4 cm 24 cm 4 cm =24 N_ =4 N 4N 24 cm A B N_8 m=f_6 m B F=16 N ABC 1 = 5 N_2 m=w_1 m w= N N 13 = F_4.5 m=882 N_1.5 m F=294 N 14 90 kg 4.5 m 1.5 m 90 kg=9.8_90=882(n) 90 kg = F_3h=30 N_h h F=30 N_ = N 3h 15 = F_6 m=300 N_4 m F=200 N 200 N 2m 200 N_2 m= 400 J 400 J 9 S T E P 1 57 40 N 40 N 20 N >> << == 13 = 14 15 20 N ;2!; N ;4!; 5 N 2 4 13 24
S T E P 2 58~59 2J 25 W 0 N 200 N 13 14 == F N 1m 1m 200 N_;2!;=0 N 1m 1m 2m =0 N_2 m=200 J 1 50 N 25 N 2m 25 N_2 m=50 J B B B A 3 N = B- A =5 N-3 N=2 N 5 N B _ =200 N_ 1 m=200 J _2=20 cm_2=40 cm N 5N =_ = N_0.2 m=2 J = N_0.2 m=2 J =5 N_0.4 m= 2J = =0 N_ m 1,000 J =1,000 J= = 40 s =25 W 25 W = N ;2!;=5 N = 20 cm 2=40 cm A 200 N_;2!;= 0 N B 50 N A B 0 N-50 N=50 N =50 N_3 m=150 J A 3 m_;2!;=1.5 m A B1m 2N 1m A =2 N_1 m=2 J 2J N N_2=20 N kg 9.8_=98(N) kg h 98 J=98 N_h h= 1m 1 ;2!; 2 A200 N_1.5 m=300 J 150 J n w F= F= 2«800 N =0 N n 2 w F= 2n 800 N F= =200 N 0 N 200 N 2_2 25
w 300 N F= = =75 N 75 N 2«2 1m =75 N_1 m=75 J F= w (500+300)N = =200 N 2n 2_2 200 N 200 N 200 N 200 N 2m 2 m_2 150 N 150 N 500 N 800 N =8 m 2m 8m 800 N_;4!;=200 N 200 N_8 m=1,600 J 13 14 == S T E P 3 60~61 0.5 m 6m 20 W 0 point 1 150 N + 2=500 N +150 N+150N=800N 0 J= + 1 N_2 m=2 J J_5 m= J =2 N _ _ { } _8=80 ;1*0);=8 20_2=40 ;; 5º;;=8 30_2=60 ;; 2º;;=30 50 N N 50 N_a= N_b 3m b=3 m-a 50 N_a= N_(3 m-a) a=0.5 m 0.5 m 3 m 0 N A B 5 m 2 m B = A Fı_5 m=0 N_2 m B Fı=40 NFÅ_3 m=a _2 m A FÅ=;3@;_A Fı=FÅ40 N=;3@;_A A=60 N =_2=0 N _2=200 N =_;2!;=2 m _;2!;=1 m =0 N_2 m=200 J =200 N_1 m=200 J 26
;2!; 30 N_2=60 N 20 N_s=60 N_2 m s=6 m 6m 400 N_ ;2!;=200 N S T E P 1 63 200 N_;2!;=0 N 200 J 0 N_2 m=200 J= =20 W s 20 W 13 2 2 2 14 8 8 8 J ~ ;4!; ~ ~ O O O @ 27
13 =;2!;mv =;2!;_1 kg_(2 m/s) =2 J ==2 J = 1 m= 2J 2N 14 =;2!;mv =;2!;_1 kg_(4 m/s) =8 J ==8 J = 1 m=8 J 8N O 0 = O =;2!; =;2!;_2 kg_(1 m/s) =1 J 4 kg A B AB=41 AB=21 4 (4) =16 8 8 2 2_(2) =8 4 2 4_(2) =16 S T E P 2 64~65 765000 J(765 kj) 13 14 15 72 m 2 4 JN m 4 4 2 16 3 2 50 cm 1 40 4 0.1 0.1 0.5 m 0.5 m = =5 m/s 0.1 s =;2!; =;2!;_20 kg_(5 m/s) =250 J 28
A B ;2!;B D 2 m/s 4 3 2 1 {J} 0 A C 1 B D 2 3 {m/s} A CB D A BC D = -=;2!;_ A 1 m/s A 1J A 2 kg B 2 m/s B 4J B 2 kg C 1 m/s C 0.5 J C 1 kg D 2 m/s D 2J D 1 kg S T E P 1 67 49 J 98 J 98 J 49 J 4 13 14 300 kg_(0 m/s) -;2!;_300 kg_(70 m/s) =765,000 J =765 kj 765,000 J(765 kj) = _ Eπ=98_ m_h Eπ=98_1 kg_5 m=49 J Eπ=98_2 kg_5 m=98 J Eπ=98_1 kg_ m=98 J = ;2!;_2 kg_v =0 J v= m/s Eπ=98_1 kg_5 m=49 J ~ Eπx 2 4 13 =_2m =;2!;_4 kg_(4 m/s) =32 J = 16 N 14 = =_ 15 60 km/h 18 m 0 km/h 4 72 m 72 m 2 4 13 9.8 =9.8_5 kg_1 m=49 J 14 49 J 29
S T E P 2 68~69 196 J 2 = 13 14 15 16 17 =9.8_20 kg_1 m= 196 J 196 J A B AB= 3_25_1=65 A 3 kg B 5 kg AEπ=9.8_3 kg_2 m=58.8 J 2 m BEπ=9.8_5 kg_1 m=49 J 1 m kg 5 m 3 m point _ h =9.8_5 kg_h=980 J h=20 m A B A B 2 A B 2 2 = = _ 2 2 cm 60 40 20 A B 0 20 40 60 80 {cm} =9.8_ kg_5 m=490 J =9.8_ kg_3 m=294 J 9.8_ kg_5 m-3 m=196 J A B AB=31 AB=31 AB=31 A B 3 A B 3 30
15 (9.8_1) N_h=5 N_0.98 m h=0.5 m 16 =_ 2 4 4 O O O O 4 80 cm 17 = _= N_0. m=0.5 J 0.5 J O S T E P 1 71 = = = 13 5 cm = = 19.6 J=9.8_2 kg_h h=1 m 13 2m 60 J B 6m B 60 J_3=180 J point h = h = 14 =_ 9.8_ kg_1 m= _0.2 m=490 N A D A =D 31
B =C ~ =A -B S T E P 2 72~73 C C =A E A E B C D B C D E 14 m/s 13 14 64 J 15 16 A BC B B CD E B C D E B D = 9.8m_ C D A E A E 0 A C C A=BDE =C h h 2 B C A C A C ;2H; B A B C A =B =C = = 32
B =(9.8_1 kg_ m)-(9.8_1 kg_3 m)=68.6 J C =9.8_m_6 mc =9.8_m_(-6) m=9.8_m _4 m C =32 A =B 9.8_m_ m= ;2!;mv B v=14 m/s 14 m/s point 14 =+ 0 J=;2!;_2 kg_(6 m/s) + 64 J 64 J 15 16 =A - D =(9.8_0 kg_0.8 m)- (9.8_0 kg_0.4 m)=392 J 74 14 8 cm D14 m/s 96 J = 13 B 8m EπE =2 m8 m= 14 14 A C B D E C =C +C E =E +E O O 2 4 2 cm_4=8 cm 8 cm D C 0 B D A E B 0 B =B +B A =D +9.8_m_14 m =9.8_m_4 m+;2!;mv v=14 m/s D14 m/s A =B + B =[;2!;_2 kg_( m/s) ]-[;2!;_2 kg_(2 m/s) ] =96 J 96 J 33
75 20 J 4N 7J 48 J 3 9 9 9 6 m/s cm_9=90 cm =+ ;2!;_1 kg_v =;2!;_1 kg_ (2 m/s) +6 J=8 J v=4 m/s _ = N_2 m=20 J h 20 J 20 J = 9.8_4 kg_1 m=_9.8 m =4 N 4N =- =;2!;_2 kg_{(4 m/s) -(3 m/s) }=7 J 7J =+ 20 N_4 m=;2!;_4 kg_(4 m/s) + =48 J 48 J S T E P 3 76~77 m/s 0.96 J 13 14 Joule 19 Joule Joule J = - 0 2 4 point J N m 0 0 5 cm =;2!; = =_ 4 2 4 2 4 20 cm 2 2 cm 4 16 80 cm 2 2 8 40 cm 1.5 2 6 30 cm = N_ m= ;2!;_2 kg_v m v= m/s m/s 34
kg (9.8_) N=98 N B A 2B A 4 A cm AB=14=( cm) B B= 20 cm E A E = =B A B g kg 1 g=0.0 kg B =A 196 J=;2!;_2 kg _v B v=14 m/s C B ;4!; C 196 J_;4!;=49 J C =B -C =196 J- 49 J=147 J 147 J=9.8_2 kg_h C h=7.5 m = =9.8_0.1 kg_2 m=1.96 J= - =1.96 J -(5 N_0.2 m)=0.96 J 0.96 J = G G = 30 m(40-) m=31 A =A A m B =B C A =B = C +C C B ;2!; C B ;4!; B h C = C +C = = _ 4 cm 2 4 4 A 9.8_2 kg_ m=196 J 0 A 196 J 35
13 14 78~81 13 14 15 16 17 18 19 20 21 22 23 40 J 8W 24 4m 25 4 26 0 N 27 28 29 30 0 0 0 0 m 25 N+50 N =(25 N_4 m)+{ _2 m} 2 +(50 N_4 m)=375 J =;2!;_ {}_ =_=30 N_ 3 m=90 J =_ =0 N_1 m=0 J _ = =98 N_1 m=98 J 98 J 9.8_=98(N) 98 N_1 m=f_4 m F=24.5 N 4m 1m 1 m : 4 m=1 m : s s=4 m 1m 4m 1 0 N_;2!;=50 N cm_2=20 cm =50 N_0.2 m= J =30 N_0.8 m =20 N_s 30 N_0.8 m=20 N_s s=1.2 m=0 cm cm 2 kg =9.8_=9.8_2=19.6(N) 20 cm 30 cm N 19.6 19.6_;2!;=9.8 19.6_;3!;?6.53 m 0.1 0.2 0.3 J 1.96 J 1.96 J 1.96 J 36
=_ =(9.8_2) N_0.1 m=1.96 J 14 0 N_0.1 m= J =34 A 1 kg 1 m/s 2 cm B 2 kg 1 m/s 4 cm C 1 kg 2 m/s D 2 kg 2 m/s 16 cm A B 2 2 B D 2 4 3 9 ;2!;_m_(2 m/s) = J m=5 kg 15 3 9 16 A B 3 A B 3 17 O 0 0 A O O0 O J A 0 A J C A 2 C A 4 2 cm_4=8 cm =_ =3 N_3 m=9 J =;2!;_2 kg_v =9 J v= 3 m/s 20 m m 18 =9.8 =9.8 20 m- m J J J 20 15 5 392 294 196 98 0 98 196 294 392 392 392 392 13 km/h 36 2 72 3 8 4 144 m 6 4 24 9 54 16 96 m 9 4 36 9 81 16 144 2 4 4 =_ m 196 J ;2!;_2 kg_v =196 J v=14 m/s 19 20 = 2m A -6 m/s B =(9.8_5 kg_2 m)-[;2!;_5 kg_(6 m/s) ]= 8J 37
21 22 23 4 4 4 20 cm 50 N 80 cm =_ =50 N_0.8 m=40 J 40 J = = =8 W 5s 40 J8W 24 1 50 5 0.1 26 B 5 cm cm A A 5 cm 0.1 m = =1 m/s 0.1 s B ;2!;_ kg_(1 m/s) =5 J 0. m 5 J=F_0. m F=0 N 0 N 27 50 N 50 N 0 N 0 N 200 N 200 N 400 N F 1 ;2!; ;8!; 1 2 8 0 28 0 0 _;8!;=400 N _;8!;=50 N 200 J 50 N_ =200 J 4m 4m 25 A B 2 A B 4 A B 4 4 29 30 38
D A 13 S T E P 1 85 ABC D 13 14 15 ~ A EBC S T E P 2 86~87 13 A E B F C D ABCDE F A 39
A B 13 14 S T E P 1 89 B C D E A F B A 13 14 15 16 17 18 19 ~ ~14 5 16~19 >>>> S T E P 2 90~91 A 13 14 15 16 ABCD EF 40
A3 A C B D B C D ABCD ABC D E A ABCD 5 5 5 13 14 15 41
16 93 S T E P 3 94~95 A 13 14 15 ABCDE A 42
5 13 14 ABC 3 5 3 15 A B C D cm 3 3 6~23 25 25 50 0~250 200~400 AB B>A AB CD << D >>>> D D 43
15 S T E P 1 97 ABC A B A B C E D 13 B 14 C 15 A 16 ~ ~15 S T E P 2 98~99 A 13 14 15 ABC A A BA C ABC B B C ABCDE A B B B A B C BE A C 44
16 S T E P 1 1 ~ ~ 13 14 AB 15 S T E P 2 1~1 A A C B 13 45
ABCDE F A A C B 13 S T E P 3 1~5 46
B ABCDE ABC DEF A C A B C A E F A B C D F B D B B D A E F A B C D F 47
17 S T E P 1 7 A B C D E F B A C D E ~ S T E P 2 8~9 13 14 15 AB 16 2 A A B B C C D E D F F E ABCDE F 48
2 22 0 % 2 2 14 15 2 AB 16 2 2 18 S T E P 1 1 13 14 15 ~ 13 ~ 49
S T E P 2 AB A 13 A 14 2~3 AB A A A A 13 A 50
14 { } 0 1 2 3 4 {} 2 0 1 2 3 4 {} 4 S T E P 3 { } 4~5 B CD ABCDE F CD { } 0 AB C D B 51
2 2 2 6~9 13 14 15 16 17 18 19 20 21 22 23 CDF 24 25 C 26 27 28 29 ABCDE FGH F 52
ABCD EF D ABC A A B B C C D E D E ABCDE 13 14 A DB EC F A D E F C 15 3 53
16 ABCDE B C 2E A 17 18 19 A B B B A 20 21 22 23 ABCD EF CDF 24 25 ABCDE C 26 54
27 28 A~C 29 55
memo 56 Ⅲ. 방정식