The radio waves emitted from Sagittarius A* region take how long to travel to Earth?
A. 220 million years
B. 50,000 years
C. 100,000 years
D. 8.5 years
Answer: B
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Indicate whether the statement is true or false
The southern highlands of Mars date to which geological era?
A) Amazonian B) Hesperian C) Cenozoic D) Noachian
A surprise from the Pioneer Venus photos was that:
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Three identical resistors are connected in series to a 12-V battery. What is the voltage across any one of the resistors?
A) 12 V B) 3 V C) 36 V D) 0 V E) 4 V