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.
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Option: D. Her childhood and professional experiences with low-income farm workers convinced her that advocacy was necessary.
Explanation:
Dolores Huerta is famously known as a labour leader in America. She became an elementary school teacher and saw the poverty of her students, who were children of farmworkers, she got involved in advocacy for agricultural workers and their families. She tried to improve social and economic conditions for workers and to fight discrimination. In 1962 Huerta and with Cesar Chavez co-founded the farmworkers union that would later call as the United Farm Workers.
Explanation:
Both China and Japan had experiences with isolationism motivated by a desire to prevent foreign influences fromundermining their values and society. The Japanese implemented the strict isolation policy because they wanted to completely ban Christianity which was rightfully perceived as the harbinger of Western domination and colonization. the Ming dynasty took an isolationist and authoritarian approach to leaderships
