Question

podem responder essas questões de fisica ? obrigado

por favoooor
foto acima

Answer 1

Bom dia

1)ΔL=Lo.∞.ΔT
ΔL=20.12.10^-6.(150-30)
ΔL=240.10^-6.120
ΔL=28800.10^-6
ΔL=0,0288M

L=Lo+ΔL
L=20+0,0288
L=20,0288M

2)L=15.1,5.10^-5.45
ΔL=1012,5.10^-5
ΔL=0,010125M

3=ΔL=100.1,9.10^-6.(45-35)
ΔL=190.10^-6.10
ΔL=1900.10^-6
ΔL=0,001900M

4)15=2000.x.500
15=1000 000x
x=15/1 000 000
x=0,000015
x=1,5.10^-5C°

5)Δl=4.12.10^-5.(60-30)
ΔL=48.10^-5.30
ΔL=1440.10^-5
ΔL=0,01440M

L=Lo+ΔL
L=4+0,01440
L=4,01440m