Physics, 29.05.2020 21:58 ellenaschool
A 1000.-kilogram roller coaster goes down a hill that is 90. meters tall. Its speed at the bottom is 40. m/s.
A. What is the efficiency of the roller coaster? Assume it starts from rest at the top of the hill.
B. What do you think happens to the “lost” energy?
C. Use the concepts of energy and efficiency to explain why the first hill on a roller coaster is the tallest.
Answers: 1
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Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is
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A 1000.-kilogram roller coaster goes down a hill that is 90. meters tall. Its speed at the bottom is...
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