Science
Junior High
๐จ400mใซใชใ็็ฑใฏใใพใ ใ้ฒใ็บ็ใใฆใใชใใใ100mใใใ1โใซใชใใจใใใใจใงใใ๏ผ
่ฆใฅใใใฆใใฟใพใใ๐โโ๏ธ
(3) ๅณ3ใฎใใใซใๅคงๆฐใๆจ้ซ0mใฎ
ๅฐ็นAใใ. ้ไธญใใ้ฒใใจใใช
ใใชใใๆจ้ซ1600mใฎๅฑฑ้ ใซ้ใใ
ๆจ้ซ0mใฎๅฐ็นๆฅใธใจๅนใไธใใๅ ด
ๅใ่ใใใ ๅฐ็นAใงๆฐๆธฉ11โ
ๆนฟๅบฆ78%ใฎใจใ, ๅฐ็นBใงใฏๆฐๆธฉ
119โ
7.8%5
jc 5.2g/m
ๅฑฑ้
1600m
400m
B
ใฏไฝโใๆนฟๅบฆใฏไฝ%ใซใชใใใ ่กจ1ใใใจใซใใฆ่จ็ฎใใๅฟ
่ฆใใใใฐๅๆจไบๅ
ฅใใฆๆดๆฐใง
ๆธใใชใใใใใ ใใ็ฉบๆฐใไธๆใพใใฏไธ้ใใ้ใฎๆฐๆธฉๅคๅใฎๅฒๅใฏใ้ฒใ็บ็ใใฆใใช
ใใจใใฏ้ซๅบฆ100mใใใ1โใ้ฒใ็บ็ใใฆใใใจใใฏ้ซๅบฆ100mใใใ0.5โใจใใๅฑฑ้ ใง้
ใฏๆถใใใใฎใจใใใ ใพใใ้ฒใ็บ็ใใใพใง1mใใใใฎ็ฉบๆฐใซๅซใพใใๆฐด่ธๆฐ้ใฏใ็ฉบ
ๆฐใไธๆใใฆใไธ้ใใฆใๅคใใใชใใใฎใจใใใ
่กจ1
ๆฐๆธฉ(โ)
1
2
3
4
5
6
7
8
9
10
้ฃฝๅๆฐด่ธๆฐ้(g/m) 5.2
5.6 5.9
6.4 6.8
7.3
7.8
8.3
8.8
9.4
(โ)
JI
12
13
14
15
16
17
18
19
20
้ฃฝๅๆฐด่ธๆฐ้(g/m')
10.0
10.7 11.4
12.1
128 136 14.5 15.4 16.3 17.3
7โใง
ๅณ3
ใงใใ
30
ๅฑฑ้
7.8g
11 c
178%
A100m
0.5ยฐ0
1600m
?
(3) ๅณ3ใฎใใใซ, ๅคงๆฐใๆจ้ซ0mใฎ
ๅฐ็นAใใ,้ไธญใใ้ฒใใจใใชใ
ใชใใๆจ้ซ1600mใฎๅฑฑ้ ใซ้ใ, ๆจ
้ซ0mใฎๅฐ็นBใธใจๅนใไธใใๅ ดๅ
ใ่ใใใ ๅฐ็นAใงๆฐๆธฉ11โ,ๆนฟๅบฆ
78% ใฎใจใ,ๅฐ็นBใงใฏๆฐๆธฉใฏไฝ
โ,ๆนฟๅบฆใฏไฝ%ใซใชใใใ ่กจ1ใใ
ใจใซใใฆ่จ็ฎใใๅฟ
่ฆใใใใฐๅๆจไบๅ
ฅใใฆๆดๆฐใงๆธใใชใใใใใ ใใ็ฉบๆฐใไธๆใพใใฏไธ
้ใใ้ใฎๆฐๆธฉๅคๅใฎๅฒๅใฏ, ้ฒใ็บ็ใใฆใใชใใจใใฏ้ซๅบฆ100mใใใ1โ, ้ฒใ็บ็ใใฆ
ใใใจใใฏ้ซๅบฆ100mใใใ0.5โใจใ,ๅฑฑ้ ใง้ฒใฏๆถใใใใฎใจใใใใพใ,้ฒใ็บ็ใใใพ
ใงใ1ใกใใใใฎ็ฉบๆฐใซๅซใพใใๆฐด่ธๆฐ้ใฏ,็ฉบๆฐใไธๆใใฆใไธ้ใใฆใๅคใใใชใใใฎใจ
ใใใ
0
Thoam Ioom
4000ๅ
B
foom: QFC = &m=4
็ซ:800
100
่กจ 1
054
-
400
5%=4000
ๆฐๆธฉ(โ)
1
2
3
4
LO
5
6
7
8
9
10
้ฃฝๅๆฐด่ธๆฐ้(g/mยฒ) 5.2 5.6 5.9
1600
6.4
6.8
7.3 7.8 8.3
8.8
9.4
ๆฐๆธฉ(โ)
11
12
13
14
15
16
17
18
19
20
800
้ฃฝๅๆฐด่ธๆฐ้(g/mยฒ) 10.0 10.7 11.4 12.1 12.8 13.6 14.5 15.4 16.3 17.3
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