What is the largest challenge currently facing the amazon rainforest

Why does physical weathering speed up the processes of chemical weathering? a) physical weathering requires abundant water, as does chemical weathering. b) physical weathering produces fresh surfaces for chemical weathering to attack. c) chemical weathering can occur only on small surfaces, not large ones. d) chemical weathering requires salt, which is provided by salt wedging.

What does a movement along the demand curve show

Ray lo bisects nlm, lm=18, no=4, and ln=10. what is the value of x?