The angle between the vectors a and b is 120 oc
and | a | = 3 | b |.
define the scalar λ such that a + b and a − λb are perpendicular to each other.

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

The element that has the greatest electronegativity is

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory