Which of the following is true of fatty acids?
A) All fatty acids are liquids at room temperature.
B) All fatty acids are solids at room temperature.
C) All saturated fatty acids are liquids at room temperature.
D) All cis-unsaturated fatty acids are liquids at room temperature.
D
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What was the most damaging type of eruption that occurred at Vesuvius in Italy?
A) A huge landslide caused a lateral blast that knocked down trees and buildings. B) A fast-moving viscous lava flow flowed through the middle of Pompeii. C) The volcano was so heavy that it caused part of the island to collapse. D) One or more pyroclastic flows hit the city of Pompeii. E) None of these are correct.
What is NOT true about a stream’s base level?
A. Temporary base levels can reach below sea level. B. It is the lower limit to a stream’s downcutting. C. It is an imaginary slope extending inland from sea level. D. Ultimate base level is sea level. E. It is the same level across all sections of the stream.
Ten seconds after starting from rest, a freely falling object on Earth will have a speed of about
A) 10 m/s. B) 50 m/s. C) 100 m/s. D) more than 100 m/s.
After the arrival of European settlers on the Lower Mississippi, residents constructed levees along the river to protect their homes and farmlands from periodic flooding as well as to keep the channel open to navigation
Now, residents have problems with land subsidence, wave erosion, land fertility, and increased severity of floods and hurricanes, particularly in the Delta area of southern Louisiana. Why would the construction of artificial levees result in these problems? What will be an ideal response?