Astro 7N exam 2 The Sun; Questions with Complete Solutions 100% Verified
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Course
Astro 7n
Institution
Astro 7n
Astro 7N exam 2 The Sun; Questions with Complete
Solutions 100% Verified
what is the sun mostly made of? Correct answer-gas
true or false the sun is stable due to balance of gravity and gas pressure in its hot interior
Correct answer-true
how hot is the sun? Correct answer-15 million degre...
Astro 7N exam 2 The Sun; Questions with Complete
Solutions 100% Verified
what is the sun mostly made of? Correct answer-gas
true or false the sun is stable due to balance of gravity and gas pressure in its hot interior
Correct answer-true
how hot is the sun? Correct answer-15 million degrees kelvin
what is the sun diameter? Correct answer-109Xearth
what is the sun mass? Correct answer-333,000xEarth
what is the sun luminosity equal to? Correct answer-4x10^24 100 Watt light bulbs
how much of all of the made of the solar system in in the sun? Correct answer-99.9%
how long has the sun been shining, and how much longer will it shine? Correct answer-
4.5 billion
5.5 billion
are slightly-cooler regions on the Sun's surface due to magnetic activity
, Astro 7N exam 2 The Sun; Questions with Complete
Solutions 100% Verified
preventing hot material from rising in that region; have 11 year cycles Correct answer-
sunspots
a long last source of energy in the stars Correct answer-nuclear fusion
what is nuclear fusion made of? Correct answer-4 protons combine to make helium 4 and
release energy in gamma rays
a fusion process in which protons build together to form helium Correct answer-proton
proton chain
the energy output from the [p chain comes from Correct answer-E=mc2
true or false the mass of a helium-4 nucleus is less than the mass of 4 protons Correct
answer-true
at the center; high density and temperature; where nuclear reactions occur
and gamma rays are produced Correct answer-core
photons are repeatedly re-absorbed and re-emitted; the energy of
an individual photon can take on average 170,000 years to pass through Correct answer-
radiative zone
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