True or False: Production is typically based on a quota in a command economy.

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.

Write a short paragraph of about 150-300 words. explain how the physical environment can limit human activities.

The blue segment below is a diameter of oo. what is the length of the radius of the circle?