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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)
Question
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
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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hydrospehere
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Updated 10/2/2012 7:30:01 AM
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The hydrosphere (from Greek ?d?? - hudor, "water" and sfa??a - sphaira, "sphere") in physical geography describes the combined mass of water found on, under, and over the surface of a planet.

The total mass of the Earth's hydrosphere is about 1.4 × 1018tonnes, which is about 0.023% of the Earth's total mass. About 20 × 1012tonnes of this is in the Earth's atmosphere (the volume of one tonne of water is approximately 1 cubic metre). Approximately 75% of the Earth's surface, an area of some 361 million square kilometers (139.5 million square miles), is covered by ocean. The average salinity of the Earth's oceans is about 35 grams of salt per kilogram of sea water (3.5%)
Added 10/2/2012 7:30:01 AM
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