Energy in Capacitors: Doubling the potential across a given capacitor causes the energy stored in that capacitor to
A. quadruple.
B. double.
C. reduce to one-half.
D. reduce to one-fourth.
Answer: A
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Most active galactic nuclei are at large distances from us; relatively few nearby galaxies harbor active galactic nuclei. What does this imply?
A) Massive black holes existed only when the universe was young and no longer exist today. B) Active galactic nuclei tend to become less active as they age. C) The jets seen in many active galactic nuclei must cause them to move far away from us. D) Active galactic nuclei can form only at large distances from the Milky Way.
According to the special theory of relativity, while traveling at very high speed your pulse rate
A) increases. B) decreases. C) remains unchanged.
Helium is more abundant on Saturn than on Jupiter
Indicate whether the statement is true or false
Complete the following nuclear decay equation:
Na + ________ ? Ne