The Earth continually falls toward the Sun, but doesn't get closer because
A. its tangential velocity causes it to fall around as well as toward the Sun.
B. the distance of fall is unattainable.
C. gravitation is extremely weak at the Sun-Earth distance.
D. all of the above
Answer: A
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A) A
B) B
C) C
D) D
E) E
The average precipitation for the entire world is:
A) 25 inches. B) 39 inches. C) 45 inches. D) 53 inches.
Which of the following is not a heterocyclic aliphatic amine?
A) piperidine B) pyrrolidine C) pyrimidine D) They are all heterocyclic aliphatic amines.
Organisms which feed only on bacteria are called ________
A) autotrophic B) bacteriovores C) carnivores D) herbivores E) omnivores