Mudah dan Aktif Belajar Fisika untuk Kelas XI
172
1:?7-:1:1=350-8-90-=5-?9;83-9;:;-?;957-0-4E 7
571?-45 9;8
G 9;8
9;8 8147-=1:-3-9;:;-?;9579-7-
9;8
9;8
-0- 4 ?5:335
?64 01=-6-? 71.1.--:
7
F 57--?3-0-8-91.-4?-.:391:3-8-951=.-4-:40-=5
91:6-05 1:1=350-8-93-63--7-:91:3-8-951=.-4-:+:?7
3- 9;:;-?;957 .1=8-7 F
F 1-=- 99 05?85
F
1.-4?-:375.1=559;83-41859.1=4
E57-4185905-:33-1.-3-53- 501-845?:38-41:1=35?;?-85?190-:63-1:1=3575:1?57=-?-=-?-1?5-9;8178
7
:1=35?;?-89;81780--?0545?:301:3-:=9 7-=1:-41859-0-8-4
3-9;:;-?;9570-:1:1=35=-?-=-?-1=9;8178 0--?0545?:301:3-:
=9 571?-45
9;8 9;8
9;8
9;8
G
F
G
F
Kata Kunci
• ekuipartisi energi • energi dalam gas
• energi kinetik gas • tekanan gas
Contoh
7.6
Contoh
7.7
Teori Kinetik Gas
173
-8-9-?=-:3?1=0--?3=-93- 0-:3=-9
1=-?9;8178 3 9;80-:.1=-?9;8178
3 9;85?:38-41=.-:05:3-:1:1=3575:1?57?=-:8-5 =-?-=-?- 710- 9;8178 0-: 1=.-:05:3-: -:?-=-
711-?-:710-9;8178?1=1.? -9;83-;7531:?1=0--?-0-1.-4.16-:-
.1=A;89185?1=01:3-:?17-:-:-?95?:38-4 1:1=3575:1?57?=-:8-5=-?-=-?-0-=59;8178;7531:
-0-7;:055?1=1.?
Tes Kompetensi Subbab
B
2+,--.5,5-4 --9;8178;7531:-0-8-4
G
F
73
45+5, 5?:30801:3-:=971905-:
3:-7-:=9 ,-8-:;7531:-0-8-4
9;8178 05-?;957 05 5:5 053:-7-: .7-:
7-=1:- C-:3 05?-:C-7-: -0-8-4 1:1=35 75:1?57 ?=-:8-5.7-:1:1=359;8178
C. Kecepatan Efektif Partikel Gas
57-0-8-9-?=-:3?1=???1=0--?1.-:C-7 9;8178C-:3
.1=31=-7 01:3-: 711-?-: 9;8178 C-:3 .1=31=-7 01:3-: 711
-?-: 0-:1?1=:C-=-?-=-?-7-0=-?711-?-:-=?57183-
0--? 05?85 1.-3-5 .1=57?
F 11-?-:1217?52-=?57183-
=9
=9 050125:5 57-: 1.-3-5 -7-= 0-=5 =-?-=-?- 7-0=-? 711-?-:
=9
-?-
=9
F +:?7 91:C-?-7-: 711-?-: =-?-=-?- 0-=5 -=?5718 3- ?5:6-8-4
4.:3-: -:?-=- 1:1=35 0-8-9 0-: 1:1=35 75:1?57 =-?-=-?- -=?5718 3-
C-5?
7
-?-
=9
145:33- 051=;814
=9
-?-
=9
F ;814 7-=1:-
0-: 1:3-:
-0-8-4 9-- 9;8178=18-?52
-0-8-4 .58-:3-: A;3-0=; 0-:-0-8-47;:?-:?-3-23.9 0--?05?857-:1.-3-5.1=57?
=9
F 57- 1=-9--: 05.?5?57-: 71 23. 9
-7-: 050--?7-: 1=-9--: .1=57?
=9
F
Mudah dan Aktif Belajar Fisika untuk Kelas XI
174
1:3-:
1.-3-59--?;?-83-0-:9--61:53- 9-7- 23. 9 0--? 05?85
=9
F 1=:C-?--:711-?-:1217?52-0-23.991::677-:
.-4B--0-4?1=?1:?9;81789;81783-C-:381.54=5:3-:=-?-=-?- .1=31=-7 81.54 1-? - 450=;31: 01:3-: 9-- 9;8178 3 9;8 -7-: .1=
31=-719-?7-8581.541-?0-=5-0-3-;7531:-.18.1=57?9191= 854-?7-: 711-?-: 1217?52
=9
.1.1=-- 61:5 3- -0- 4 ?1=?1:?
- 11-?-:217?521.1=----0-4
E
3
1 1
-?- 33 .0-3
9
,.0-
2.3
.3
5?:38-4711-?-:1217?523-.1=9--61:5
73 9 C-:3.1=-0-0-8-9?-.:3
.1=?17-:-:G -
7 571?-45
73 9 G
- 11-?-:1217?52-=?57183-0545?:301:3-:91:33:-7-:23.9
=9
- 73 9
9
9 -05711-?-:1217?523--0-8-4
9
1:?7-:1=.-:05:3-:711-?-:1217?52-:?-=-9;81789;81783-450=;31:
=
3 9;80-:3-;7531:
=
3 9;8-0-4?1=?1:?
7
=9
11-?-:1217?521.-:05:301:3-:-7-=0-=571.-857-:9--9;8178=18-?52:C- 1-=-9-?19-?505?857-:
=9 =9
3 9;8 3 9;8
=9 =9
Contoh
7.8
Contoh
7.9
Energi Matahari berasal dari reaksi fusi nuklir yang berasal dari
penggabungan 2 buah proton. Sebenarnya, proton memiliki gaya
tolak menolak dengan proton lainnya karena muatannya sejenis.
Selain itu, proton tidak memiliki energi kinetik yang cukup besar
untuk mengatasi gaya tolak-menolak tersebut. Akan tetapi, ada sebagian
proton yang memiliki kecepatan tinggi sehingga memiliki energi
kinetik yang cukup besar. Oleh karena itu, Matahari masih bersinar.
The suns energy is supplied by nuclear fusion process that starts with the
merging of two protons. However, protons have a motion to repel each
other because of their electrical charges and protons of average speed
do not have enough kinetic energy to overcome the repulsion. Very fast
protons with speed can do so, however and for that reason the sun
can shine.
Sumber: Fundamentals of Physics, 2001
Informasi
untuk Anda
Sumber: Fundamental of Physics, 2001
Information for You
Teori Kinetik Gas
175
1.-4?-:375.1=550-=--0-?17-:-:?1=?1:?57- ?17-:-: 0-=- 0-8-9 ?-:375 :-57 91:6-05 7-85
?17-:-:198-.1=--7-4711-?-:=99;8178 0-=-0-8-9?-:37505.-:05:37-:01:3-:711-?-:
=998-98-
1.-4?-.:301:3-:A;891
9 91:3-:0:3
9;83-:1;:-0-4E -
1:?7-:1:1=3575:1?57?;?-83-:1;:?1=1.? .
1=--7-41:1=3575:1?57=-?-=-?-1?5-9;83- 9;8
1.-4?-:37501:3-:A;89185?1=.1=559;83- 9;:;-?;95757-1?5-9;81783-919585751:1=35
75:1?57=-?-=-?-G
F
?1:?7-:?17-:-:3- 0-8-9?-:375-?9
G
- 1=--7-41:1=3575:1?57=-?-=-?-9;81783--0-
4 1:?7-:8-41:1=350-8-90-=5-?9;83--0-4
E 3-= 711-?-: 1217?52 -=?5718 -? 3- .1=.-4
91:6-057-85198-.1=--01=-6-?43-?1=1.? 4-=05?5:37-?7-:
1=--7-4.-:C-7:C--?;941859C-:3051=87-: :?791:355.-8;:.1=05-91?1=
9-0-4
E-3-=?17-:-::C--?95?:38-41:1=3575:1?57 0-=51?5--?;918591=--7-4711-?-:=-?-
=-?-0-=51?5--?;9418590-:.1=--7-4711-?-: 1217?52:C-
11-?-:1217?52
=9
-?-=?57183-
9 57-3-?1=1.?.1=-0-0-8-9?-.:3.1=?17-:-:
-?9-?9G -?1:?7-:8-49--61:5
3-?1=1.?
Tes Kompetensi Subbab
C
2+,--.5,5-4
Rangkuman
-501-8?50-7-0-05-8-9-?3-0--?91958575 52-?C-:391:017-?552-?3-501-8-0-47-9-=
0-:?17-:-:?1=?1:? 1=-9--:3-501-8
7;:?-:-?-
57-9--0-:9;83-501-8?50-7?1?-1=-9--: 3-501-8.1=.-491:6-05
-?- 01:3-:
=5:5175-=?551:1=3591:3-:33-.-4B-3- C-:3.1=-0-050-8-9=-:3?1=??91=-7-:
798-:0-=5-=?57183-C-:391958575?17-:-: 1:1=350-:711-?-:31=-7C-:3-9-
1=-9--:3-0-8-9=-:3?1=??
-?-
7
:1=3575:1?573- :1=35 0-8-9 3- -0-8-4 698-4 18=4 1:1=35
75:1?57-=?57183-0-8-9-?=-:3?1=??
7
1=57?5:51:1=350-8-9:?73-05-?;957 -
-0-4=1:0-4
?53-01=-6-? 71.1.--:
7
. -0-410-:3
859-01=-6-?
71.1.--:
7
-0-4?5:335
?64 01=-6-?71.1.--:
7
11-?-: 1217?52 -=?5718 3- 0--? 0571?-45 01:3-:1=-9--:
=9
