Suppose you have two capacitors and want to use them to store the maximum amount of energy by connecting them across a voltage source. You should connect them
A) in parallel across the source.
B) in series across the source.
C) It doesn't matter because the stored energy is the same either way.
A
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How many radioactive atoms are present in a sample that has an activity of 0.5 mCi and a half-life of 10 years? (1 curie = 3.7 × 10^10 decays/s)
a. 9.5 × 10^12 atoms b. 8.4 × 10^12 atoms c. 7.3 × 10^12 atoms d. 6.5 × 10^12 atoms e. 2.7 × 10^5 atoms
That light can undergo interference is evidence that it:
a. has electric properties. b. is made of corpuscles. c. behaves like a wave. d. has a phase of 180°.
A non-uniform meter stick is found to balance on a knife edge at the 60-cm mark. Where is the center of gravity of the meter stick?
a. at the 40-cm mark b. at the 45-cm mark c. at the 50-cm mark d. at the 55-cm mark e. at a position not given
As their name implies, all planetary nebulae feature spherical shells and look like the disks of Uranus or Neptune
Indicate whether the statement is true or false