Einstein's equation E = mc2 describes the conversion of mass to energy that occurs during nuclear fusion. If a billion joules of energy are released by this process, how much mass has been consumed? (Recall, a joule is a Nt-m or kg-m2/s2 and the speed of light is ~300 million m/s.)
1.1 × 10-8 kg (110 mg)
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Suqs, kasbahs, jamis and medinas are typically found in
A) Islamic cities. B) West European cities. C) East European cities. D) cities designed by Le Corbusier. E) Postmodern cities.
"Paper parks" are frequently found in the developing world. Which of the following are characteristic of these?
A. They are designed for ecotourism, rather than conservation or sustainability B. They are managed to extract wood for pulp and paper production C. There is little in the way of infrastructure or enforcement of rules D. They are managed for hunting and collection of resources
What property of an electron makes it possible to use electron microscopes?
A) They can be focused using smaller lenses. B) They have shorter wavelengths than visible light. C) They are electrically charged. D) They can be generated with electricity. E) none of the above
Approximately how much of the world's estimated oil and gas reserves can be found within the
sediments of the continental margins? a. One-third b. One-half c. Two-thirds d. Three-quarters