Which of the following is the most common and simple variation?
A. equation density
B. physiological density
C. agricultural density
D. arithmetic density
Answer: D
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The chemical formula of rust is Fe2O3. Which of the following is the correct common name for this compound?
A) iron oxide B) ferric oxide C) ferrous oxide D) diiron trioxide
Another word for cover crops is
A. Mulch B. Shade planting C. Green manure D. Strip farming E. All of these are correct
The best approach for slowing worldwide deforestation will require ________
A) limiting biodiversity losses B) focus on charcoal use in developed countries C) focus on soil erosion issues D) multiple strategies E) focus on limiting consumption in developing countries
A rifle of mass 2 kg is suspended by strings. The rifle fires a bullet of mass 1/100 kg at a speed of 200 m/s. The recoil velocity of the rifle is about
A) 0.001 m/s. B) 0.01 m/s. C) 0.1 m/s. D) 1 m/s. E) none of the above