6. Paleomagnetists study the magnetic properties of rock, What evidence did they find in the rock around the Mid-Atlantic Ridge that proves that the crust is spreading?
(Choose all that apply)
A. There is a strong magnetic field at the Mid-Atlanitic ridge,
B. Symmetrical bands with alternating polarity of metal particles inside the rock on
both sides of the ridge.
C. Older rocks are found further from the ridge, while younger rocks are found
closer to the ridge.
D. Younger rocks are found on the surface while older rocks are found in the lower
layers of the crust

The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

What is the speed of an object at a given moment?