Which three colors comprise the image on a TV screen?
A. Magenta, cyan, and yellow.
B. Red, blue, and yellow.
C. Yellow, blue, and green.
D. Red, blue, and green.
Answer: D
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Which of the following statements describes what is required for a forecast to show skill?
A. It must be better than a forecast based on persistence or climatology. B. It must be accurate over more than 90 percent of the forecast area. C. It must be accurate to within 2°C of the predicted temperature. D. It must use the analogue method of forecasting.
Long-term storage of U.S. military nuclear waste
A) remains unresolved, as nuclear materials continue to accumulate on U.S. bases in many regions. B) will be combined with commercial nuclear waste when a suitable storage facility is constructed. C) is no longer an issue as methods to convert this waste into nuclear fuel has addressed this problem. D) has been shipped to a central location in New Mexico for more than a decade.
A stream tributary may erode headward to capture another stream system because:
a. it has a steep gradient b. its channel is cut into nonresistant material c. it has a concave longitudinal profile d. both a and b
Compounds known as a-hydroxycarboxylic acids are found in many cosmetics. These compounds contain both a hydroxyl group and a carboxyl group. What is the minimum number of oxygen atoms present in an a-hydroxycarboxylic acid?
A) 1 B) 2 C) 3 D) 4