As shown in the Discussion Starter of this chapter, 26% of the 9.6 quadrillion Btu of renewable energy in 2014 came from hydroelectric plants. How much coal is saved (not consumed) because of the hydroelectric plants? Assume coal has an average energy content of 10,000 Btu per pound and a coal-fired power plant has an efficiency of 36% and a 6% loss in the transmission lines.
What will be an ideal response?
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In what climatic conditions is frost action most effective? What will be an ideal response?
Nagorno-Karabakh is an ethnic enclave of ________ in ________
A) Georgia; Russia
B) Moldova; Romania
C) Armenia; Azerbaijan
D) Azerbaijan; Georgia
E) Armenia; Georgia
Biodiversity scientists view the worldwide decline in bird species with alarm because
A. birds are protected under the Endangered Species Act. B. birds are an important source of food for many people. C. birds are excellent environmental indicators. D. birds live in nearly every climate and biome. E. about three fourths of all bird species live in forests.
Air rising forcibly lifted upslope when it meets a topographic barrier such as a mountain is an example of ________ lifting
A) convergent B) convectional C) orographic D) frontal