A white dwarf is composed of
a. hydrogen nuclei and degenerate electrons.
b. helium nuclei and normal electrons.
c. carbon and oxygen nuclei and degenerate electrons.
d. degenerate iron nuclei.
e. a helium burning core and a hydrogen burning shell.
c
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Humans have not sent a spacecraft into the interior of the Sun to confirm any models of the interior. What evidence then do we have to support our current ideas about the solar interior?
A) solar neutrinos B) solar flares C) sun spots D) X-ray observations that penetrate the gas E) We have no evidence, just informed guesses.
Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
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Use this exhibit to answer the following question(s).
Refer to Exhibit 16-1. The point at which the object has zero velocity and negative acceleration is
A. A B. B C. C D. D E. E
Consider how the Moon moves through the Solar System and complete the following sentence. The Moon orbits the Sun
A) once a month. B) once a year. C) once a day.
The ozone layer is a region within the
A) troposphere. B) stratosphere. C) mesosphere. D) ionosphere.