Physics, 17.02.2020 21:32 harveyangel123p2tjae
A metal wire 1.50 m long has a circular cross section of radius 0.32 mm and an end-to-end resistance of 90.0 Ohms. The metal wire is then stretched uniformly so that its cross-section is still circular but its total length is now 6.75 m. What is the resistance of the wire after stretching? (Units: Ohm.)
Answers: 3
,here 
is resistivity, l is length and A is area 
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A metal wire 1.50 m long has a circular cross section of radius 0.32 mm and an end-to-end resistance...
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