This type of federalism defines a division between the national and state powers and responsibilities. each level of government therefore has its own sphere of influence, separate and distinct:

Which statement is correct? the speed of the light ray is the same in air and medium a. the speed of the light ray is the same in air and medium b. medium a and medium b have different densities because light refracts at different angles. medium a and medium b have the same density because the light ray strikes both at the same angle.