Selembar kaca berukuran 2m^2 pada suhu 25 derajat C. Berapakah luad kaca tersebut pada suhu 80 derajat C ? koefisien muai panjang kaca alpha = 9,0 x 10^-6 K-1
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Zuhh
Dik : A0 = 2 m² T0 = 25 T = 80 C α = 9,0 x 10^-6 dit : A ?
maka : β = 2 x α = 2 x 9,0 x 10^-6 = 18 x 10^-6
ΔA = A0 x β x ΔT = 2 x 18.10^-6 x (80-25) = 2 x 18.10^-6 x 55 = 1,98 x 10^-3
A = A0 + ΔA = 2 + 0,00198 = 2,00198 m²
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veronikasamosir1
Dik: Ao= 2m^2 ΔT=80-25 = 55oC α = 9 x 10^-6 dit: At jawab At= Ao (1+2αΔT) = 2 (1+2x9x10^-6x55) =2 (1+ 990x10^-6) =2+1980x10^-6 =2+0,00198 =2,00198 m^2
A0 = 2 m²
T0 = 25
T = 80 C
α = 9,0 x 10^-6
dit : A ?
maka :
β = 2 x α
= 2 x 9,0 x 10^-6
= 18 x 10^-6
ΔA = A0 x β x ΔT
= 2 x 18.10^-6 x (80-25)
= 2 x 18.10^-6 x 55
= 1,98 x 10^-3
A = A0 + ΔA
= 2 + 0,00198
= 2,00198 m²
ΔT=80-25 = 55oC
α = 9 x 10^-6
dit: At
jawab
At= Ao (1+2αΔT)
= 2 (1+2x9x10^-6x55)
=2 (1+ 990x10^-6)
=2+1980x10^-6
=2+0,00198
=2,00198 m^2