Why does a star's luminosity drop so much during the Hayashi track?
What will be an ideal response?
The surface of the star maintains a fairly constant temperature but the size continues to shrink significantly. Since the luminosity depends on the square of the radius, as the radius decreases by a factor of 100, the luminosity drops by a factor of 10,000. The slight increase in surface temperature changes the luminosity only a little.
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Explain what the granulation of the solar surface is related to
What will be an ideal response?
Which of these situations is possible?
1.Energy is transferred by heat to a system and the internal energy of the system decreases. 2.Energy is transferred by heat to a system and the internal energy of the system remains constant. 3.Energy is transferred by heat to a system and the internal energy of the system increases. 4.All of these are possible.
A(n) ___________ is a set of beliefs that appears to be based on scientific ideas, but which fails to obey the most basic rules of science
a. theory b. hypothesis c. pseudoscience d. allegory e. scientific model
What is the Oort cloud?
A) It is the spherical distribution of the trillion or so comets thought to orbit the Sun at great distances. B) It is another name for the cloud of gas from which our solar system was born. C) It is a great cloud of gas that resides far beyond the orbit of Pluto. D) It is a giant storm in the atmosphere of Saturn.