A neutron bouncing off a heavy nucleus loses speed. If it instead bounces off a light nucleus it loses
A) less speed.
B) more speed.
C) the same amount of speed.
Answer: B
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Which of the following words best describes the sum total of all matter and energy that exists?
A) supercluster B) universe C) multiverse D) macrocosm
A star has a parallax of 0.01 arc seconds. Its distance is
A) 1 parsec. B) 0.01 parsecs. C) 10 parsecs D) 0.1 parsecs. E) 100 parsecs.
Magnetic Field of a Long Wire: A vertical wire carries a current vertically downward. To the east of this wire, the magnetic field points
A. north. B. east. C. south. D. down.
The image below shows a rock formation nicknamed “the face on Mars” that was taken by the Viking 1 orbiter in 1976. Given the clear resemblance to a face, what is an appropriate scientific reaction to this image?
A) Assume it is most likely a coincidental result of light and shadow, and plan higher resolution follow-up observations.
B) Assume that the image is probably evidence of an advanced civilization, and develop plans to attempt radio communication wit the civilization.
C) Conclude that the resemblance to a human face is so clear that it cannot have been made by nature and that this geological feature must have been built by an advanced civilization.
D) Assume that NASA's spacecraft must have been hacked by someone perpetrating a hoax, and therefore ignore the image