What is wave interference, and what two types are there?
What will be an ideal response?
Wave interference is the result of two or more waves combining. When they combine in phase—that is, with crests overlapping crests and troughs overlapping troughs—the resulting wave has greater amplitude. This is constructive interference. When crests overlap with troughs, waves are cancelled or diminished. This is destructive interference.
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What regions and/or countries below account for three-quarters (74%) of the natural gas reserves in the world?
A) Australia and United States B) Brazil and sub-Saharan Africa C) India and East Asia (China, Koreas, Japan) D) Russia, central Asia, Middle East E) South Africa, Sudan, Zimbabwe
In a 10-year period from 2006-20015, the United States was ________ for hurricanes.
A. way above average B. on average C. below average D. above average
You are a herder on the commons. You go out counting sheep one day and you come to suspect that your neighbor, who also has rights to graze on the commons, has recently added some extra sheep to his flock. You are a well-read shepherd, and you worry that these extra sheep could easily lead to what Garrett Hardin calls the “tragedy of the commons.” Drawing upon the theories presented in your readings and lecture, explain what you might do to prevent this tragedy from occurring.
What will be an ideal response?
You wish to navigate your yacht from Europe to the United States. Which type of map projection would be most useful?
a. Informal b. Mercator c. Topographic d. Equivalent e. Interrupted