Based on its orbit, Pluto is a large member of
A) the asteroid belt.
B) the Kuiper belt.
C) the Oort cloud.
D) the moon system around Neptune.
E) an extrasolar planetary system.
B) the Kuiper belt.
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A gold-nickel alloy
Neutron activation is used
A. to treat cancer B. to search for rare atoms C. to provide energy D. to create light
The energy of sound in air eventually becomes
A) increased internal energy in the air. B) weaker and weaker until it disappears. C) cancelled by destructive interference. D) all of the above E) none of the above
To date, our serious searches for extraterrestrial life have been done almost entirely:
A) in Roswell and Gulf Breeze. B) with radio telescopes. C) with optical telescopes looking for nuclear tests. D) with microwaves in the giant molecular clouds. E) with infrared telescopes looking for greenhouse gases.