A 1-kg aluminum frying pan, of specific heat 900 J/kg°C, is heated on a hot stove from 20°C to 100°C, which requires an amount of heat of
A. 144,000 J.
B. 1800 J.
C. 72,000 J.
D. 900 J.
Answer: C
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The introduction of exotic plants and animals into new ecosystems, such as the introduction of African bees to Brazil in the 1950s with hopes of improving the local bee-keeping industry, is an example of
A) ecological imperialism. B) demographic collapse. C) virgin soil epidemic. D) transcendentalism. E) the Columbian exchange. Answer: A
How do evaporates form? Give an example
What will be an ideal response?
Ecosystem-based timber harvesting uses methods that ________
A) are the most cost efficient in the short term B) have the greatest impacts on forest ecosystems C) leave seed-producing or mature trees uncut to provide for future forests D) are very popular with timber companies E) are ecologically harmless
Which of the following is associated with signal transduction?
A) amplification of a signal B) modification of a signal C) modulation of a signal D) none of these