What process does the image represent? A)
the creation of rift valleys by the divergence of tectonic plates
B)
the formation of an oceanic trench by the subduction of tectonic plates
the convergence of tectonic plates, resulting in the creation of fold
mountains
D)
the spreading of new crust created by volcanic activity near a mid-oceanic
ridge
12)

The ozone hole appears in antarctica during

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.