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kokavikol90
@kokavikol90
July 2022
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определить площадь поперечного сечения и длину медного проводника,если его сопротивление R=1Ом,а масса равна 20г
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onzalai
R = (ρ*l) / S; m = ρ₀*V = ρ₀Sl ⇒ l = m / (ρ₀S);
R = (ρm) / (ρ₀S²)
R*(ρ₀S²) =
ρm
S² =
(ρm) / (ρ₀R)
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Answers & Comments
R = (ρm) / (ρ₀S²)
R*(ρ₀S²) = ρm
S² = (ρm) / (ρ₀R)