According to the second law of thermodynamics, the entropy of any system always increases
A) True B) False
B
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As a white dwarf cools its radius will not change because
a. pressure due to nuclear reactions in a shell just below the surface keeps it from collapsing. b. pressure does not depend on temperature for a white dwarf because the electrons are degenerate. c. pressure does not depend on temperature because the white dwarf is too hot. d. pressure does not depend on temperature because the star has exhausted all its nuclear fuels. e. material accreting onto it from a companion maintains a constant radius.
Briefly explain how we can use spectral lines to determine an object's rotation rate
What will be an ideal response?
Why do astronomers believe that Triton is a captured moon?
A) Triton is very small and potato-shaped, which is common of captured moons. B) Triton is too large to have been formed in the "miniature solar nebula" thought to have surrounded Neptune in its very early history. C) Triton appears to be made mostly of ice. D) Triton orbits Neptune in a direction opposite that of Neptune's rotation.
The longest living stars are those of
A) low mass. B) high mass. C) intermediate mass.