Resposta :
s0= 40 . 50
s0 = 2000 cm^2
β = 2 . 3,2.10^-6
β = 6,4.10^-6
Δs = s0 . β . (tf - tI)
Δs = 2000 . 6,4.10^-6 . (25 - 13)
Δs = (2000 . 6,4).10-6 . 12
Δs = 12800.10^-6 . 12
Δs = (12800 . 12).10^-6
Δs = 153600.10^-6
Δs = 0,1536 cm^2 ✓
s0= 40 . 50
s0 = 2000 cm^2
β = 2 . 3,2.10^-6
β = 6,4.10^-6
Δs = s0 . β . (tf - tI)
Δs = 2000 . 6,4.10^-6 . (25 - 13)
Δs = (2000 . 6,4).10-6 . 12
Δs = 12800.10^-6 . 12
Δs = (12800 . 12).10^-6
Δs = 153600.10^-6
Δs = 0,1536 cm^2 ✓