Question

Fisika smp (Pakai cara)

Answer 1

Diketahui :
jika luas awal = Ao
luas akhir = At
suhu awal = To
suhu akhir = Tt

maka

Ao = 1,5 m²
At = 1,50072 m²
To = 30 °C
Tt = 50 °C

ditanyakan :
koefisien muai panjang?

jawab :

∆A = At - Ao
∆A = 1,50072 - 1,5
∆A = 0,00072 m

∆T = Tt - To
∆T = 50 - 30
∆T = 20 °C

jika koefisien muai panjang = a

∆A = Lo x 2 x a x ∆T
0,00072 = 1,5 x 2 x a x 20
0,00072 = 60 a
a = 0,00072 : 60
a = 0,000012 / °C