Calculate the current (in A) through a 9.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of nichrome is 100×10-8  Ω·m)

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A: Rate of change of temperature remains constant  (T2 - T1 )/t1 = T4 - T3 /t

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