Astudent calculates that the water potential of a solution in a dialysis bag is equal to -6.25 bars. the water potential of a solution surrounding the bag is -3.25 bars. in which direction will water flow?

Explanation:

Water potential is defined as potential energy of water per unit volume with respect to potential energy of pure water. When some salt is dissolved in water  , its potential energy becomes negative . Pressure on water increases its potential . Physical phenomena like osmotic pressure, surface tension etc influences the water potential.

Direction of flow of water is guided by water potential. Water always flows from higher water potential to lower water potential. In the given problem water will flow fro solution having water potential of -3.25 bars to that having water potential of - 6.25 bars.

no. dot product   =0 when vecs at right angles

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