Question

Koefisien muai panjang baja adalah 0,000011/˚C. Jika panjang sepotong baja pada suhu 25˚C sama dengan 10cm, panjang sepotong baja pada suhu 35˚C adalah....
A.10,000011cm B.0,00011cm C.10,0011cm D.10,011cm

Answer 1

Diket:
α = 0,000011/'c
lo = 10cm
t1 = 25'c
t2 = 35'c
Dit: l.....?
l = lo (1 + α (t2-t1))
l = 10 (1 + 0,000011(35-25))
l = 10 (1 + 0,000011(10))
l = 10 (1 + 0,00011)
l = 10 (1,00011)
l = 10,0011 cm jawab C

Answer 2

Dik :
α = 0,000011/C
T0 = 25 C
L0 = 10 cm
T= 35 C
dit : L ?

dijwb :
L= L0 x (1+α x ΔT)
  = 10 x (1 + 0,000011 x (35-25)
  = 10 x (1 + 0,000011 x 10)
  = 10 x (1 + 0,00011)
  = 10,0011 cm (C)