Astro 7N Final Exam Questions With 100% Correct Answers |
Verified
1. What is the sun Mostly gas- hydrogen 73% and helium 25%
com- prised of?
2. Forces of the sun inward force- balance of gravity makes it stable and outward force
gas
pressure in its hot interior
3. What causes gas Nuclear fusion in the Sun's core, 15 million degrees kelvin
pres- sure and how
hot are these
reactions in the
Sun?
Diameter is 109 X and mass is 333,000 X
4. Diameter and mass
of the Sun
compared to Earth
5. Luminosity of the sun 4 x 10^24 100 Watt lightbulbs
6. How much of the 99.9%
solar system's mass
is in the sun?
7. Life of the sun 4.5 billion years, will continue for another 5.5 billion years
8. Sunspots slightly-cooler regions on the Sun's surface due to magnetic
activity
preventing hot material from rising in that region; have 11 year
cycles
9. nuclear fusion long lasting source of energy in stars; 4 protons combine to
make
heluium-4 (2 protons and 2 neutrons) and release energy in
gamma rays
10. Proton-Proton Chain 2 protons collide at very high speed, stick together and one chang
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, Astro 7N Final Exam Questions With 100% Correct Answers |
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into
a neutron, ends with a Deuterium nucleus
Deuterium nucleus collides with another proton and makes a
helium-3 Nucleus, more energy is released
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, Astro 7N Final Exam Questions With 100% Correct Answers |
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2 Helium-3 nuclei combine to make Helium 4 Nucleus releasing
back 2 protons and more energy
11. Energy output from p-p E=mc^2
chain
12. Which has a higher 4 protons; some mass is converted into energy in the form of
mass and why :Heli- gama rays in the formation of a Helium-4 nucleus
um-4 nucleus or 4
pro- tons
13. Core at the center, high density and temp., nucleur fussion occurs here
and gama rays are produced
14. Radiative zone photons are repeatedly re-absorbed and re-emitted; energy in an
indi-
vidual proton can take on avg 170,000 years to pass through
15. convective zone hot gas rises and cold gas sinks; light traverses in about one
week
16. photosphere temperature 5,780 K; this is the "surface" of the Sun that we see;
photons
have been converted to visible wavelengths; can see "granules" d
to convection bringing material up and down in cells
17. chromosphere red or orange color; temperature about 4,500 K; we see through
this, down to the photosphere
18. flare an eruption coming out of the sun due to magnetic activity
19. prominence hoop shaped eruption out of sun due to magnetic activity
20. corona low density, temp about 1 million K; visible during solar eclipses
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Verified
1. What is the sun Mostly gas- hydrogen 73% and helium 25%
com- prised of?
2. Forces of the sun inward force- balance of gravity makes it stable and outward force
gas
pressure in its hot interior
3. What causes gas Nuclear fusion in the Sun's core, 15 million degrees kelvin
pres- sure and how
hot are these
reactions in the
Sun?
Diameter is 109 X and mass is 333,000 X
4. Diameter and mass
of the Sun
compared to Earth
5. Luminosity of the sun 4 x 10^24 100 Watt lightbulbs
6. How much of the 99.9%
solar system's mass
is in the sun?
7. Life of the sun 4.5 billion years, will continue for another 5.5 billion years
8. Sunspots slightly-cooler regions on the Sun's surface due to magnetic
activity
preventing hot material from rising in that region; have 11 year
cycles
9. nuclear fusion long lasting source of energy in stars; 4 protons combine to
make
heluium-4 (2 protons and 2 neutrons) and release energy in
gamma rays
10. Proton-Proton Chain 2 protons collide at very high speed, stick together and one chang
1/
24
, Astro 7N Final Exam Questions With 100% Correct Answers |
Verified
into
a neutron, ends with a Deuterium nucleus
Deuterium nucleus collides with another proton and makes a
helium-3 Nucleus, more energy is released
2/
24
, Astro 7N Final Exam Questions With 100% Correct Answers |
Verified
2 Helium-3 nuclei combine to make Helium 4 Nucleus releasing
back 2 protons and more energy
11. Energy output from p-p E=mc^2
chain
12. Which has a higher 4 protons; some mass is converted into energy in the form of
mass and why :Heli- gama rays in the formation of a Helium-4 nucleus
um-4 nucleus or 4
pro- tons
13. Core at the center, high density and temp., nucleur fussion occurs here
and gama rays are produced
14. Radiative zone photons are repeatedly re-absorbed and re-emitted; energy in an
indi-
vidual proton can take on avg 170,000 years to pass through
15. convective zone hot gas rises and cold gas sinks; light traverses in about one
week
16. photosphere temperature 5,780 K; this is the "surface" of the Sun that we see;
photons
have been converted to visible wavelengths; can see "granules" d
to convection bringing material up and down in cells
17. chromosphere red or orange color; temperature about 4,500 K; we see through
this, down to the photosphere
18. flare an eruption coming out of the sun due to magnetic activity
19. prominence hoop shaped eruption out of sun due to magnetic activity
20. corona low density, temp about 1 million K; visible during solar eclipses
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