Aif two such generic humans each carried 2.5 coulomb of excess charge, one positive and one negative, how far apart would they have to be for the electric attraction between them to equal their 700 n weight?

Using Coulomb's Law 

F = {k(Q1)(Q2)}/r² 

Where F =force in Newtons, k = Coulomb constant, Q1 = - Q2= charge of the objects in Coulumbs, and r is the distance between the objects. 

Solving for r: 

r = sqrt[{k(Q1)(Q2)}/F] 

where k = 8.897 x 10^9 N•m²/C², Q1 = 2.5 C, Q2 = -2.5 C, and F = -700 N 

Note: Negative magnitude of Force indicates attraction. 

r = 8,912.77 m

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

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it