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• a roller coaster train with a mass of 500 kg stops at the top of a hill. if the hill is 110 m high, what is the potential energy of the train? 4,900 j 5,612 j 55,000 j 539,000 j
  
• think about historical leaders or leaders portrayed in books or movies you’ve enjoyed. did these leaders govern fairly? why or why not?
  
• characters who do not change during the course of a story are __________. stagnant dynamic interesting static
  
• which addition expression has the sum 8 – 3i ? (9 + 2i) + (1 – i) (9 + 4i) + (–1 – 7i) (7 + 2i) + (1 – i) (7 + 4i) + (–1 – 7i)
  
• n 1940, mussolini ended italy’s neutrality by declaring war on the us. germany. the ussr and the us. great britain and france.
  
• what is the value of cosine theta in the diagram below? a unit circle is shown. a radius with length of 1 forms angle theta in the first quadrant. the radius goes to point (0.6, 0.8) on the unit circle.
  
• when two intermediate chemical equations are combined, the same substance that appears in the same phase can be canceled out, provided that it is a reactant in one intermediate reaction and a catalyst in the other reaction. it is a product in one intermediate reaction and a catalyst in the other reaction. it is a reactant in one intermediate reaction and a product in the other reaction. it is a reactant in both of the intermediate reactions.
  
• why was there continuous political instability in west africa between 1500 and 1700? a. traders provided a regular supply of guns to tribal leaders. b. there was a loss of able-bodied men to the slave trade. c. the income of the common african was limited. d. traders introduced manufactured goods from europe. e. there was a lack of economic development.
  
• the tilt of the earth's axis of rotation is responsible for the - responses a ocean's tides.ocean's tides. b size of the moon.size of the moon. c brightness of stars.brightness of stars. d earth’s seasons.
  
• which phrase from the passage best helps the reader to identify the passage as a satire? he has been eight years upon a project for extracting sunbeams out of cucumbers which were to be put in phials hermetically sealed he told me, he did not doubt, that, in eight years more, he should be able to supply the governor’s gardens but he complained that his stock was low