Sekeping kca pd suhu 0°c luasnya 500 cm². koefisien muai pjg kaca itu 0,000009/°c. maka luas logam itu pada suhu 200°c adlh
Zuhh
Dik : T0 = 0 C T = 200 C A0 = 500 cm² α = 0,000009/C dit : A ?
dijwb : A = A0 x (1 + β x ΔT) = 500 x (1 + 2xα x (200-0) = 500 x (1 + (2 x 0,000009)x200) = 500 x (1 + 0,000018 x 200) = 500 x (1 + 0,0036) = 501,8 cm²
T0 = 0 C
T = 200 C
A0 = 500 cm²
α = 0,000009/C
dit : A ?
dijwb :
A = A0 x (1 + β x ΔT)
= 500 x (1 + 2xα x (200-0)
= 500 x (1 + (2 x 0,000009)x200)
= 500 x (1 + 0,000018 x 200)
= 500 x (1 + 0,0036)
= 501,8 cm²