on peut écrire :
ΔL + L0 = 12 x 10⁻⁶ x L0 x ΔT + L0 = 30 m
L0( 1 + 12 x 10⁻⁶ x ΔT) = 30 m
⇒ L0 = 30/(1+12x10⁻⁶ x 40) = 30/1.00048 = 29. 9856 m
ΔL = 12 x 10⁻⁶ x 29.9856 x 20 = 0.0071965 m
L0 - ΔL = 29. 9856 - 0.0071965 = 29.978 m
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Verified answer
on peut écrire :
ΔL + L0 = 12 x 10⁻⁶ x L0 x ΔT + L0 = 30 m
L0( 1 + 12 x 10⁻⁶ x ΔT) = 30 m
⇒ L0 = 30/(1+12x10⁻⁶ x 40) = 30/1.00048 = 29. 9856 m
ΔL = 12 x 10⁻⁶ x 29.9856 x 20 = 0.0071965 m
L0 - ΔL = 29. 9856 - 0.0071965 = 29.978 m