• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Sun: Nuclear Powerhouse - Wayne State University Physics and
Sun: Nuclear Powerhouse - Wayne State University Physics and

... the star expands to a new point where gravity would balance the thermal pressure the expansion would reduce the pressure inside the core the temperature in the core would drop the nuclear fusion rate would subsequently slow down the thermal pressure would then drop the star would shrink the temperat ...
Astronomy 115 Homework Set #1 – Due: Thursday, Feb
Astronomy 115 Homework Set #1 – Due: Thursday, Feb

... A ball is attached to a string and is swung in a circular path in a horizontal plane, as illustrated below. At point P, the string suddenly breaks. ...
Sun - TeacherWeb
Sun - TeacherWeb

... Light and heat waves and solar wind particles Solar flares and the solar wind ...
PowerPoint File
PowerPoint File

... • The fuel of a main sequence star is its own mass • More massive stars have more fuel than less massive stars. • But they are using their fuel up at a fast rate, much faster than proportional to their mass. • So, massive stars run out of fuel sooner. The more massive, the shorter their Main Sequenc ...
Brief History of Earth
Brief History of Earth

... Earth’s surface cools enough for a solid crust to form. Earth’s atmosphere (accumulated gases from volcanic outgassing and comets) contains (in decreasing order) carbon dioxide, nitrogen, water vapor, methane, ammonia, carbon monoxide, sulfur dioxide, hydrogen sulfide, and hydrogen cyanide. Because ...
Introduction - Jeopardy
Introduction - Jeopardy

... so low that it would float if you put the planet in a giant glass of water ...
aug27 - Astronomy
aug27 - Astronomy

... Come up with as many examples of products which are named after astronomical objects. ...
Sunspots Magnetic Field
Sunspots Magnetic Field

... Our Sun is one of the 100 billion stars in our galaxy, with a 1.4 million km diameter and a core temperature of 15.6 million K. The photosphere, as the name implies, consists of photons of natural visible light, mostly unpolarized. It is sprinkled with small dark, relatively cool areas called sunsp ...
1 - TeacherWeb
1 - TeacherWeb

... 33. List 4 forms of light or particles that come from the sun. 50. Give an example of an unstable metal. 34. How does solar energy reach the Earth? 51. Draw and label the modern version of an atom. 35. What happens to a super giant star at the end of its life cycle? 36. What is a black hole? 37. Wh ...
Intermediate - Maggie`s Earth Adventures
Intermediate - Maggie`s Earth Adventures

... © Maggie's Earth Adventures, LLC 2005. Teachers may reproduce for classroom use. ...
ASTR3007/4007/6007, Tutorial 4: Deuterium Burning in Protostars
ASTR3007/4007/6007, Tutorial 4: Deuterium Burning in Protostars

... the polytropic constant KP in terms of M , R, ξ1 , and dΘ/dξ|ξ=ξ1 . Exercise 2. Using the polytropic constant KP from exercise 1, and the relationship between central density ρc and KP , to express the central density in terms of M , R, ξ1 , and dΘ/dξ|ξ=ξ1 . Exercise 3. Finally, express the central ...
Howell Exam 1 Review Outline
Howell Exam 1 Review Outline

... determining stability of nucleus (and in fusion and radioactive decay reactions) Types of radioactive decay Use of radioactive age dating techniques Simple half-life and  (decay constant) equations Understand the Rb/Sr isochron diagram (from Lab 1) The proton-proton chain in solar fusion: Need for ...
Space Review
Space Review

... Low mass Stars (dwarf) Stay small most of their lives and burn slowly (100 billion years). They may eventually turn into hot `white dwarfs` and burn out quietly. 2. Intermediate mass stars (like the sun) have a life of about 10 billion years. They may eventually expand into a red giant. It collapses ...
Return both exam and scantron sheet when you
Return both exam and scantron sheet when you

... 44. The layer of the Sun that we normally see is the (a) corona. (b) chromosphere. (c) ionosphere. (d) photosphere. 45. The neutrinos interact with other elementary particles via (a) electrical force. (b) magnetic force. (c) strong nuclear force. (d) weak nuclear force. 46. The solar neutrino proble ...
Motions of the Planets
Motions of the Planets

... All of the planets (and the Moon) orbit within the ecliptic plane, therefore they appear to move along similar “tracks” on the sky. The Sun, Moon, and planets move amongst the constellations of the zodiac. ...
8. The Sun as a Star
8. The Sun as a Star

... But before we call a press conference or make any big deals with HECO, we better figure out how much energy those bottled nuclear reactions are generating. And the answer is... About a thousand times less energy than I'm giving off by being alive. That's all! Per unit mass, the Sun produces much les ...
Earths Place in the Universe
Earths Place in the Universe

... The Sun is the largest object in the solar ...
Problems in Chapter 13
Problems in Chapter 13

- Lexington JHS
- Lexington JHS

... The Big Bang – A Theory A long time ago, (10 – 15 billion yrs ago) there once was an empty place. This place began filling up with small particles (atoms, gases, etc). They finally created enough energy to break the gravitational hold on them and EXPLODE. The scattered particles cool down over time ...
star
star

... Small solid fragments that orbit the sun Meteor – a meteoroid that passes through the Earth’s atmosphere  Meteorite – a meteor that lands on Earth  Impact crater – depression in Earth’s surface caused by a meteorite ...
Life Cycle of a Star
Life Cycle of a Star

Does the Sun rotate?
Does the Sun rotate?

... The Sun is powered by thermonuclear fusion, which converts hydrogen into helium. Matter gets turned into energy in the process. ...
History of Astronomy
History of Astronomy

...  Developed 365 day year solar calendar ...
No Slide Title
No Slide Title

... The Sun is the nearest star to Earth. The sun is just an ordinary star. The next brightest star to us is called Alpha Centauri. Light from Alpha Centauri takes 4.3 years to get to us. Light from our sun only takes 8 minutes. Alpha Centauri are really three stars all orbiting each other. One of thes ...
Variable Stars: Pulsation, Evolution and applications to Cosmology
Variable Stars: Pulsation, Evolution and applications to Cosmology

... Sun is a non-radial oscillator. Modes with periods between 3 an d8 minutes – five minute oscillations are p modes: l going from 0 to 1000. Modes with longer periods – about 160 minutes could be g modes: l ~1-4. Comparison of observed and theoretical frequencies can be used to calibrate solar models: ...
< 1 ... 185 186 187 188 189 190 191 192 193 ... 237 >

Standard solar model

The standard solar model (SSM) is a mathematical treatment of the Sun as a spherical ball of gas (in varying states of ionisation, with the hydrogen in the deep interior being a completely ionised plasma). This model, technically the spherically symmetric quasi-static model of a star, has stellar structure described by several differential equations derived from basic physical principles. The model is constrained by boundary conditions, namely the luminosity, radius, age and composition of the Sun, which are well determined. The age of the Sun cannot be measured directly; one way to estimate it is from the age of the oldest meteorites, and models of the evolution of the Solar System. The composition in the photosphere of the modern-day Sun, by mass, is 74.9% hydrogen and 23.8% helium. All heavier elements, called metals in astronomy, account for less than 2 percent of the mass. The SSM is used to test the validity of stellar evolution theory. In fact, the only way to determine the two free parameters of the stellar evolution model, the helium abundance and the mixing length parameter (used to model convection in the Sun), are to adjust the SSM to ""fit"" the observed Sun.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report