Haya asked in Science & MathematicsPhysics · 1 month ago

Repeat part A for a wire with a cross-sectional area of 3.9×10−7 m2  .?

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  • Anonymous
    1 month ago

    Xsection A = 3.9*10^−7 m^2 = 0.39 mm^2...

    gold resistivity ρg = 24.4*10^-3 ohm*mm^2/m @ 20°C

    resistance R = ρg*L/A = 24.4*10^-3*1*10^2/39 = 2.44/39 = 0.063 ohm

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  • Anonymous
    1 month ago

    And we are supposed to know what part A is how?

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  • alex
    Lv 7
    1 month ago

    Where's part A ????

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