Sebatang besi panjangnya 5meter pada suhu 20drajat celcius dipanaskan hingga suhu 100drajat celcius, koefisien muai panjang besi 0,000012/drajat celcius. Berapakah panjang akhir besi tersebut?
Zuhh
Dik : Lo = 5 m To = 20 C T = 100 C α = 0,000012/C
dit : L ?
mk : ΔL = α x Lo x ΔT = 0,000012 x 5 x (100-20) = 0,0048 m
L = Lo + 0,0048 = 5 + 0,0048 = 5,0048 m
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dnnyz07
Lt = Lo(1+αΔΤ) Lt = 5(1+ 0,000012 x 80) {80=100-20} Lt = 5(1+0,00096) Lt = 5 x 1,00096 = 5,0048 m
Lo = 5 m
To = 20 C
T = 100 C
α = 0,000012/C
dit : L ?
mk :
ΔL = α x Lo x ΔT
= 0,000012 x 5 x (100-20)
= 0,0048 m
L = Lo + 0,0048
= 5 + 0,0048
= 5,0048 m
Lt = 5(1+ 0,000012 x 80) {80=100-20}
Lt = 5(1+0,00096)
Lt = 5 x 1,00096
= 5,0048 m