A 4-?F capacitor has a potential drop of 20 V between its plates. The electric potential energy stored in this capacitor is:
A) 0.8 ?J
B) 8 ?J
C) 80 ?J
D) 800 ?J
E) 8000 ?J
D
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The Tharsis region of Mars was most likely formed
A) from sediment that piled up due to past water erosion B) by plate tectonics C) by a plume of molten mantle material rising to the surface forming a bulge D) from compressions in the Martian crust as the planet cooled and contracted
As a radio source, the period of "pulsar Earth" is
A) 30 minutes. B) 23 hours, 56 minutes. C) 24 hours. D) 29.5 days. E) 365.25 days.
For a star of Sun-like mass, what is the last stage of the nuclear fusion?
a. Hydrogen to helium. b. Helium to carbon and oxygen. c. Carbon to magnesium. d. Fusion goes all the way up to iron.
The first modern astronomer to propose a heliocentric model for the solar system was ____________________
Fill in the blank(s) with correct word