Which of the following is not a heteroatom?
A. N
B. P
C. O
D. both A and B
E. All of the above are heteroatoms.
Answer: E
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What is the specific humidity of air at 21°C with 50% relative humidity?
This question show how relative humidity changes as cold, dry outside air is brought inside and warmed. Figure 12.1 shows that as air warms, the maximum specific humidity increases. Therefore, if the air warms but the amount of water vapor stays the same, its relative humidity decreases. Because of this, many people who live in climates with cold winters use humidifiers in their homes to make the air more comfortable. Building engineers recommend that for optimal comfort, inside air should be 21°C, with 50% relative humidity. What will be an ideal response?
The species most likely to be affected if the water temperature increases from 74°F to 80°F would be ________
A) both the desert pupfish and the rainbow trout B) neither the desert pupfish or the rainbow trout C) the Antarctic ice fish, the rainbow trout, and the desert pupfish D) the rainbow trout E) the desert pupfish
How does the pace of urbanization in developing countries contribute to the food problem?
A) People moving to cities cause disruptions in the transportation network. B) Hundreds of millions of people who lived in rural areas and produced food now live in cities. C) Expanding urban heat islands cause changes to the local climates. D) The most productive land is paved over to develop middle-class suburbs. E) People who live in cities adopt western-style diets that are heavy on meat consumption.
Which of the following applies to the labeling of most packaged foods in the U.S.?
A) Each manufacturer determines what to put on the label. B) Labeling requirements are set by each state. C) Labeling requirements are set by the federal government. D) Labeling requirements are set by the World Health Organization.