Physiological density is the number of
A) acres of farmland per the total area of a country.
B) farmers per area of farmland.
C) people per area of flat land.
D) people per area suitable for agriculture.
E) farm animals per area suitable for agriculture.
Answer: D
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At the same time an ice cube drops vertically another ice cube slides off the edge of a table. Which ice cube hits the floor first?
A. The sliding one. B. The dropped one. C. both hit at the same time D. none of the above
Which of the following is true when comparing the hydrolysis of amides in acidic solution with the hydrolysis of amides in basic solution?
A) Either the acid or base is a true catalyst of the hydrolysis reaction. B) Neither the acid nor the base is a true catalyst of the reaction. C) The acid is a true catalyst, but the base is a reagent and must be present in the appropriate stoichiometric amount. D) The base is a true catalyst, but the acid is a reagent and must be present in the appropriate stoichiometric amount.
As the zenith angle ________ the amount of energy reaching the surface ________.
A. decreases, decreases B. increases, increases C. increases or decreases, remains constant D. increases, decreases
Water depth increases over a continental shelf to the outer edge depth of ________ to ________ meters.
A. 500; 600 B. 200; 300 C. 100; 200 D. 400; 500 E. 300; 400