Compare and contrast the water velocity and type of streamflow in a rocky mountain stream versus a silt-bottomed stream along the Gulf Coast
What will be an ideal response?
Answer: The rocky mountain stream will have a higher gradient and a narrow, deep channel with a small wetted perimeter, so water will have a higher velocity. However, water flow will be impeded due to the rough channel bottom. This will also result in more turbulent flow. A silt-bottomed stream has a smoother channel bottom, reducing turbulence. However, because the topography is so flat along the Gulf Coast, there is little gradient and the stream will have a wider, flatter bottom, which will result in a slower water velocity.
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Which of the following is true about thin-plate splines for spatial interpolation?
A. The thin-plate splines method tends to produce steep gradients (overshoots) in data-poor areas. B. The thin-plate splines method produces a minimum-curvature surface. C. The thin-plate splines method produces smooth isolines. D. All of these are correct E. Both the thin-plate splines method produces a minimum-curvature surface and and smooth isolines.
Thunder will not occur?
a. ?without lightning. b. ?in wintertime thunderstorms. c. ?in thunderstorms over the ocean. d. ?when a thunderstorm is producing precipitation. e. ?in thunderstorms without precipitation.
What do many experts attribute as a cause of many of Africa's civil conflicts?
A) the ill-conceived territorial divisions crafted at the Berlin Conference B) uneven distribution of resources C) outside agitators D) unemployment E) Apartheid
A supercluster is a
A. local cluster with at least 10,000 supergiant stars. B. very large local cluster. C. cluster of galactic clusters. D. local cluster with at least 500 supermassive black holes.