A sheet of copper is 5 mm thick and hassurface dimensions of 6 cm × 21 cm .If the long edges are joined to form atube 21 cm in length, what is the resistance between the ends? The mass densityof copper is 8920 kg/m3and its resistivity is1.7 × 10?8 Ω · m .Answer in units of ΩWhat mass of copper is required to manufacture a 1200 m-long spool of copper cable witha total resistance of 5.6 Ω?Answer in units of kgI got the first part but can‘t get the second. The answer to the first question is 1.19E-5 Ω. Please help with the second!
