Now study Figure 10.39, which shows global temperatures from 1880. Focus on the period since about 1960, and compare what you notice about the temperatures to what you've learned about carbon dioxide levels in Questions 1—4. Which of the following statements best describes the relationship?
A) The warmest years correlate exactly with the years of greatest CO2 abundance, indicating that CO2 is the single most important factor controlling global temperature changes.
B) The warmest years correlate roughly with the years of greatest CO2 abundance, indicating that CO2 is important but other factors also contribute to global temperature changes.
C) The warmest years are not correlated with years of high CO2 abundance, indicating that factors other than CO2 have the most important effect on global temperature changes.
B) The warmest years correlate roughly with the years of greatest CO2 abundance, indicating that CO2 is important but other factors also contribute to global temperature changes.
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Consider the circuit shown below. Which of the circuit diagrams below that figure correctly represents the circuit shown? 
In a double-slit experiment, the distance between the slits is 0.2 mm, and the distance to the screen is 150 cm. What wavelength (in nm) is needed to have the intensity at a point 1 mm from the central maximum on the screen be 80% of the maximum intensity?
A. 900 B. 700 C. 500 D. 300 E. 600
What could happen in planetary systems where the nebular gas is quickly disbursed?
A) No terrestrial planets would form. B) The only planets would be more massive than Jupiter. C) Many planets would be destroyed by migration onto the central star. D) Large ice-rich planetesimals would not be able to gather hydrogen and helium and become gas giants.
When a capacitor is fully charged, the current through the capacitor in a direct-current circuit is
a. zero. b. at its maximum value. c. equal to the current in a resistive circuit in parallel with the capacitor circuit. d. greater than the current in a resistor that is farther from the battery than the capacitor. e. zero if it is the only capacitor, but maximum if there is another capacitor in series with it.