_________failure is when the specimen fails as a result of the application of many stress cycles.
Fill in the blank(s) with the appropriate word(s).
Fatigue
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As a 4-10 solar mass star leaves the main sequence on its way to becoming a red supergiant, its luminosity
A) decreases. B) first decreases, then increases. C) increases. D) remains roughly constant. E) first increases, then decreases.
Astronomical events, such as an asteroid impact or nearly supernova, have probably altered the course of evolution on Earth
Indicate whether the statement is true or false
Briefly describe why the fact that we detect neutrinos coming from the Sun supports the idea that the Sun generates energy by nuclear fusion
What will be an ideal response?
Two stars both have parallaxes of 0.023", but star A has apparent magnitude +2.3, while star B is magnitude +7.3. Which statement is true?
A) Star B must be ten times more luminous. B) Star A is both 100× brighter and larger than star B. C) Star A is both 100× brighter and more luminous than star B. D) Star A must be ten times closer. E) Nothing, since we do not know their absolute magnitudes.