You and a friend are asked to draw the two-dimensional electric field line pattern for two charged objects located near each other. the charge on the first object is +2q (with q positive), and the charge on the second object is −q. you show 32 field lines emanating from the first charge and 16 field lines terminating on the second charge. your friend shows 24 field lines emanating from the first object and 12 terminating on the second object.

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