The least massive stars, including our sun, eventually end their lives as
A) neutron stars.
B) red giants.
C) black holes.
D) white dwarfs.
E) quasars.
D
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Standing Sound Waves: An organ pipe of length L that is open at one end resonates in its third harmonic with a wavelength of 2L/3. Is the other end of the pipe closed or open?
A. closed B. open C. We cannot tell from the information provided.
Which of the following makes it very difficult to detect planets around other stars?
A) Planets are constantly orbiting their stars, so we don't know where to point our telescopes to see them. B) Planets are typically at least a billion times fainter than their host stars. C) Planets give off only infrared light, not visible light. D) Planets orbit too far from their stars to be detected.
What is the inductive reactance of a 20-mH inductor at a frequency of 60 Hz?
A) 7.5 ? B) 0.13 ? C) 1.2 ? D) 1.2 m? E) 7.5 m?
A dead-end page is a term for a one-page website.
Answer the following statement true (T) or false (F)