R=po*L/S S=π*d²/4 R=4*po*L/(π*d²)
d1/d2=√3 R1=R2/3
d1/d2=1/2 R1=4*R2
d1/d2=1/√10 R1=10*R2
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R=Ro*(1+α*ΔT) R=Ro+ΔR
α=ΔR/(Ro*ΔT)=500/(100*100)=0.05
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R=po*L/S S=π*d²/4 R=4*po*L/(π*d²)
d1/d2=√3 R1=R2/3
d1/d2=1/2 R1=4*R2
d1/d2=1/√10 R1=10*R2
===========
R=Ro*(1+α*ΔT) R=Ro+ΔR
α=ΔR/(Ro*ΔT)=500/(100*100)=0.05
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