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• select the correct answer. an iron bar at 200°c is placed in thermal contact with an identical iron bar at 120°c in an isolated system. after 30 minutes, both iron bars are at 160°c. if the iron bars were placed in thermal contact in an open system instead of an isolated system, how would the results be different? assume that the room temperature is 25°c. a. the temperatures of the iron bars after 30 minutes would be less than 160°c because heat would be lost to the surroundings. b. it would take more than 30 minutes for both iron bars to reach 160°c because heat would be transferred less efficiently. c. the temperatures of both iron bars would increase as they absorb heat from the surroundings. d. the temperatures of both iron bars would decrease because pieces of them would be lost to the surroundings.
  
• whose explorations led to a greater knowledge of north america, the arctic, australia, and the hawaiian islands?
  
• who or what was the target of the watergate break-in? a. daniel ellsberg's doctor's office b. investigative reporters from the washington post c. headquarters of the democratic national committee d. headquarters of the committee to re-elect the president
  
• that's just the tip of the iceberg"" is a popular expression you may have heard. it means that what you can see is only a small part of the overall problem. as the diagram shows, most of an iceberg is actually out of sight, below the water level. based on this diagram, what is the most likely density of the iceberg? (assume a density of 1.03 g/ml for seawater.)
  
• which characteristic is least important for her hypothesis to have? ability to be tested based on the opinion of her classmates ability to be proven incorrect based on her current knowledge
  
• which factor is important to consider when buying a car for commuting long distances to work? advertising campaigns horsepower exterior color maintenance plan
  
• ¡muchachos!
  
• given a graph of a system that has exactly one solution, how would you estimate the solution to the tenths place? explain the process.
  
• choose the right answer to complete the sentence. nixon resigned the presidency in august 1974
  
• select the correct answer. what is money supply? a. the total amount of money invested into infrastructure b. the amount of money borrowed from a foreign country c. the total amount of money circulating in the economy d. the amount of money earned through exports e. the amount of money an entrepreneur spends on manufacturing a good