The ionosphere
A) is produced by the action of solar radiation and atmospheric atoms.
B) consists of ozone ions.
C) reflects solar ultraviolet and atmospheric atoms.
D) occurs at roughly the same altitude as high clouds.
Answer: A
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What is the maximum theoretical efficiency possible for an engine operating between 100°C and 400°C?
A) 25% B) 45% C) 55% D) 65% E) 75%
The wave that arises in experiments such as the double-slit experiment with electrons is best described as
A) a pressure wave. B) a heat wave. C) a matter wave. D) a wave of electric charge. E) an electromagnetic wave.
Which of the following is the most convincing observation that suggests that like Europa, Ganymede may also have a subsurface ocean?
A) the detection of salts on the surface that may have been brought up from below the crust B) the presence of young grooved terrain that may be the result of cryovolcanism C) the fact that it is the largest moon in the solar system and, hence, should have plenty of internal heat to maintain liquid water beneath its surface D) in addition to its internal magnetic field, Ganymede has a magnetic field induced by Jupiter which is consistent with a salty ocean beneath its crust
Compare insulators and conductors on the atomic level
What will be an ideal response?