A lab technician is studying the effect of temperature on the resistance of a current carrying wire. She applies a voltage to a silver wire at a temperature of 61.0°C and notes that it produces a current of 1.50 A. If she then applies the same voltage to the same wire at −88.0°C, what current should she expect (in A)? The temperature coefficient of resistivity for silver is 3.80 ✕ 10−3 (°C)−1. (Assume that the reference temperature is 20°C.)

see earlier

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

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answer: 31, 5556. 952 seconds