Page 36 - MODUL IPA KELAS VII

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Kunci Jawaban

2.1 Diket:

L = 20 m

–5
0
α = 1,1 x 10 m/ C
ΔT = 60°C- 10°C = 50°C
Maka:

ΔL = α. L 1 .Δt

–5
-2
= 1,1 x 10 x 20 x 50 = 1,1 x 10 meter
2.2 Diket:

luas mula-mula (A 1) = 5.000cm
2
kenaikan suhu (∆T) = 20°C – 30 °C = 10 °C

-6
-6
-1
koefisien muai luas (β) = 2.(9 x 10 °C )= 18 x 10 .°C
-1
∆A = A 1⋅ β ⋅ ∆Τ
-2
2
2
-1
-6
= (5.000cm ) × (18 x 10 °C ) × (10 °C) = 9 x 10 cm
.

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