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.
Federal government is a type of national government in which government have powers to delegates the power to other elected member of the states. There can be two level of federal government in a country either it is performing through common institutions or through powers as prescribed by a constitution of the state.