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

Suppose that a comet that was seen in 563 a. d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.