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The core of a star must reach a temperature of _____ degrees Celsius for hydrogen fusion to begin. 10,000 100,000 1,000,000 10,000,000 100,000,000 Question #18MultipleChoice Score: The _____ of a star is primarily determined by its surface temperature. compositionsizeapparent brightnessagecolor Question #19MultipleChoice Score: Hydrogen fusion occurs in the _____ of the Sun. photospherecoronacoreradiative zonechromosphereconvective zone Question #20MultipleChoice Score: The Sun is ...
Weegy: The core of a star must reach a temperature of 10,000,000 degrees Celsius for hydrogen fusion to begin. The brightness of a star is primarily determined by its surface temperature. Hydrogen fusion occurs in the core of the Sun The Sun is [ expected to undergo hydrogen fusion for a total of 10 billion years. ] (More)
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Asked 10/1/2012 7:33:54 AM
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What is Tybalt's dominant humor?
Weegy: The answer is phlegmatic. (More)
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Asked 10/1/2012 11:36:57 AM
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A red dwarf is _____. the remains of a supernova a hot pulsar a white dwarfs that has cooled a small main sequence star a protostar
Weegy: When a red giant completes helium fusion and collapses, it becomes a white dwarf. (More)
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Updated 10/1/2012 8:07:19 AM
1 Answer/Comment
A red dwarf is a small main sequence star.

Added 10/1/2012 8:07:20 AM
A red dwarf is _____. the remains of a supernova a hot pulsar a white dwarfs that has cooled a small main sequence star a protostar
Weegy: When a red giant completes helium fusion and collapses, it becomes a white dwarf. (More)
Question
Updated 10/1/2012 8:07:56 AM
1 Answer/Comment
A red dwarf is a small main sequence star.

Added 10/1/2012 8:07:56 AM
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