Answer:A pendulum illustrates the conservation of energy. The pendulum has the most potential energy - the energy of position or stored energy - when it is highest above the ground. It has the most kinetic energy - the energy of motion - when it is moving the fastest. As the pendulum swings downward, the potential energy changes to kinetic energy. As it swings upward, the kinetic energy changes to potential energy. The back-and-forth swinging of a pendulum is simple harmonic motion - motion that repeats periodically. The period of a pendulum is the time needed for one complete swing back and forth. This period is constant; it changes only if the length of the pendulum is changed. Ask student to time the periods of their pendulums when the pendulums swing through a longer distance (larger arc) or shorter distance (smaller arc). They will discover that the periods are the same. Have the students then change the mass by adding one or more washer to their pendulum. When the students time the periods, they discover that the period does not change if the mass is changed. Ask students to experiment to find what will change the period of the pendulum. Students will discover that the period will change if the pendulum’s length is changed.
Explanation:
If the Constitution had not been ratified the United States would not be the way it is now. Our rights that we have today are protected by the Constitution and if it had not been ratified we could not have been guaranteed the life that we have now (which most people around the globe wish to have.) The Constitution is a major part of U.S history and if it were not ratified the history of this country would have changed completely. Congress would have been working for the governments best interest and not the citizens' best interest. I also think that if the Constitution was never ratified, the U.S would have split into two separate nations- North and South. The North would have continued in the industry world while the South would have chosen the world of agriculture.
Answer:
The Battles of Lexington and Concord, fought on April 19, 1775, kicked off the American Revolutionary War. On the night of April 18, 1775, hundreds of British troops marched from Boston to nearby Concord in order to seize an arms cache.
It was Franklin D. Roosevelt, who was President of the United States at the time, who coined the name for the United Nations, since he wanted to usher in a new era of international cooperation.
Answer: Mayflower Compact
Explanation: The Mayflower Compact was a document created by the passengers on the Mayflower upon landing in North America. It designed a system of self-governance for the colony based on majority rule.
