You work for the National Park Service and have ideas on how to improve Mission 66. What are you working on?
Answer: A former plan that was instrumental in developing the infrastructure of the national parks in the U.S. more than 50 years ago.
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The reduction of outdoor air pollution in the United States has been so successful because:
a. The U.S. Congress supported it and diligently crafted laws to ensure its success. b. U.S. citizens insisted that the laws be passed. c. The country is affluent enough to afford the controls and improvements it required. d. All of these answers are correct. e. Only U.S. citizens insisted that the laws be passed and the country is affluent enough to afford the controls and improvements it required are correct.
A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 s. The speed of the car just before the brakes were applied was
A) 1.2 m/s. B) 15 m/s. C) 30 m/s. D) 45 m/s. E) none of the above
The most important factor influencing the characteristics of a sedimentary rock is:
a. the type of rock eroded to produce the sediments b. the nature of the sediment-transport processes c. the characteristics of the depositional environment d. the age of the rock
Which of the following is not one of the pluvial developments of the Pleistocene Epoch?
A) Increased rainfall B) Decreased evaporation C) Increased runoff D) Increased mass of glacial ice E) Increased numbers of lakes