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 political system in which power is shared between the national government and the state governments. The United States included the system of federalism in the Constitution for important reasons and there were powers that were granted and/or shared to the governments involved.