Which is a statement of the second law of thermodynamics?
a) entropy tends to increase in a system.
b) the net reaction rate is zero at equilibrium.
c) energy cannot be created or destroyed.
d) molecular motion stops at absolute zero.

In chile, the deepest earthquake occurred at 61.7°w longitude at a depth of 540 km. if the rocks at the focus began subducting 10 million years ago and are now 1000 km from their original position, what is the average rate of subduction in cm/yr?