Using a 1.5-mF capacitor, a 2.5-mF capacitor, and a 6.0-mF capacitor, which of the following capacitances cannot be made by a combination that uses all three?
a. 10.0 mF
b. 0.81 mF
c. 6.9 mF
d. 0.67 mF
e. 3.3 mF
d
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Only one of the statements below uses the term theory in its correct, scientific sense. Which one?
A) Einstein's theory of relativity has been tested and verified thousands of times. B) Evolution is only a theory, so there's no reason to think it really happened. C) I have a new theory about the cause of earthquakes, and I plan to start testing it soon. D) I wrote a theory that is 152 pages long.
In common physics terminology, a particle with a negative potential energy is in a(n) potential ______________
Fill in the blank(s) with correct word
The event horizon of a black hole is:
a) the distance at which a star is torn apart by tidal forces b) the minimum distance from which light can escape c) the distance at which a human body is torn apart by tidal forces d) the distance from which we can see inside the black hole e) the point of infinite density.
When the Sun becomes a red giant
A) some life on Earth may still be able to survive on the surface B) life will probably not be able to survive even beneath the surface C) life may still be able to survive in the atmosphere D) the Earth will be destroyed