Explain how the Earth recycles rock including how new rock is formed and how old rock returns to the mantle.

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .