The physics definition of period is the duration of one complete cycle of a wave or oscillation.
Federalism- a form of government where a group of states, territories, etc., are governed by one central power. Federalists- a member of the Federalist party. Dual Federalism-the federal government and the statesâ government have separate, but equal, powers.
Federalism is a system of government in which a written constitution divides power between a central government and regional or sub-divisional governments. Both types of government act directly upon the people through their officials and laws. Both types of government are supreme within their proper sphere of authority.