Anyone wanna zoom for a while plz

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.

Distance that the transcontinental railroad covered from omaha to san francisco.

The pacific plate is an oceanic tectonic plate. how did a hot spot and the pacific plate interact to form the hawaiian islands?