What can iron filings sprinkled on a piece of paper demonstrate? a. the clockwise motion of the magnetic field b. the counter-clockwise motion of the magnetic field c. the pattern of the magnetic field lines d. the distortion of the magnetic fields

The answer is C. because the lines will look the same as the earths gravity field (you can look up a graph)

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

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