Go to the screen "Mars Mission Landing Sites," and and select Opportunity landing site (2004). Explore all five zoom levels offered, making sure to read the captions at the tops of the screens. Based on the information provided, why was the landing site,called Meridiani Planum, chosen for the Opportunity mission?
A. The region was in the only part of Mars that had not yet been explored.
B. The region has very low elevation, and therefore might once have been in an ancient ocean.
C. The region was already known to have very small rocks called "blueberries" that likely formed in liquid water.
D. The region was already known to have minerals likely to have formed in liquid water.
E. The region is near the Martian equator, which makes landing easier.
Answer: D. The region was already known to have minerals likely to have formed in liquid water.
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A) fails to produce a buoyant force on the ice. B) has dissolved air in a liquid state. C) is composed of open-structured crystals. D) is less dense than ice.
A transformer is to be designed to increase the 30 kV rms output of a generator to the transmission-line voltage of 345 kV rms. If the primary winding has 80 turns, how many turns must the secondary have?
a. 6 b. 70 c. 920 d. 9200 e. 12
If the nation's yearly total energy use and also the yearly gross national product [GNP] are graphed, the two graphs rise at the same rate until the mid-1970s, but they diverge from each other after about 1973
This divergence of the graphs shows that A) energy use increases when the nation's goods and services increase. B) U.S. energy efficiency decreased after 1973, due to lower energy prices. C) energy efficiency has played a large role in providing goods and services since 1973. D) as the price of goods and services decreases, energy use increases. E) an increasing GNP causes energy use to also increase.
The capacitance of a parallel plate capacitor is directly proportional to its plate separation
Indicate whether the statement is true or false