In a federal system of government (also known as a federation), the local and state governments share power with the central government, though the central government has final authority. explain how this is different from a parliamentary system of government.

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.