Discuss why the use of large-scale hydropower plants may fall slowly over the next several decades.
What will be an ideal response?
The reservoirs will fill with silt and become useless faster than new systems are built. Also, there is concern about the amount of methane being released from the decomposition of submerged vegetation in the reservoirs. In addition, as mountain glaciers melt, the source of water for the streams where many of the hydropower plants are located will be depleted.
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Indicate whether the statement is true or false
Argues that the same processes seen today have operated throughout geologic time (i.e., the
present is the key to the past): a. catastrophism d. uniformitarianism b. neptunism e. communism c. plutonism
Given the following information determine which of these acids is the strongest? Ka for boric acid is 7.3 x 10^-10 pKa of acetic acid is 4.75 Ka for lactic acid is 8.4 x 10^-4 pKa of phenol is 9.89
A) acetic acid B) formic acid C) lactic acid D) phenol
Suppose a weather forecast states the following: Increasing cloudiness and warm today, with the possibility of showers by this evening; turning much colder tonight; winds southwesterly, becoming gusty and shifting to northwesterly by tonight. Which of the following types of weather fronts would be responsible for this forecast?
A. cold front B. stationary front C. cold-type occluded front D. warm front