Which of the following statements is true? a. igneous rocks form from the cooling and crystallization of magma. b. fossils are frequently found in metamorphic rock. c. extrusive igneous rocks, found in the earth's lithosphere, are not subject to weathering. d. sedimentary rocks are formed as a direct result of chemical weathering.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Determine the moment of the force f about an axis extending between a and c. express the result as a cartesian vector. a is at the origin, c is at (4,3,0) and f = (4i + 12j -3k) lb coming out of b (4,3,-2).

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?