Which of the following elements commonly forms an ion with a 2+ charge?
a. Li
b. Al
c. S
d. Ca
d
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Resistance and Resistivity: Consider two copper wires of equal cross-sectional area. One wire has 3 times the length of the other. How do the resistances of these two wires compare?
A. Both wires have the same resistance. B. The longer wire has 1/3 the resistance of the shorter wire. C. The longer wire has 3 times the resistance of the shorter wire. D. The longer wire has 9 times times the resistance of the shorter wire. E. The longer wire has 27 times times the resistance of the shorter wire.
Vision Problems: If the lens in a person's eye is too highly curved, this person is suffering from
A. farsightedness. B. spherical aberration. C. astigmatism. D. chromatic aberration. E. nearsightedness.
Which of the following describes volcanism?
A) the excavation of bowl-shaped depressions by asteroids or comets striking a planet's surface B) the eruption of molten rock from a planet's interior to its surface C) the disruption of a planet's surface by internal stresses D) the wearing down or building up of geological features by wind, water, ice, and other phenomena of planetary weather
If CP for an ideal gas is 35.4 J/mol/K, which of the following is CV for this gas?
a. 12.5 J/mol/K b. 20.8 J/mol/K c. 29.1 J/mol/K d. 27.1 J/mol/K e. 43.4 J/mol/K