Earths layers can be defined by their chemical composition. from surface to center, what are these layers?

a ) continental crust, oceanic crust, mantle

b ) lithosphere, asthenosphere, mantle

c )crust, mantle, core

d ) asthenosphere, lower mantle, core

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.