OCS 1005 : Test 1 Fall 2012

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azuremammoth471

15 Mar 2019

School

LSU

Department

Oceanography & Coastal Sciences

Course

OCS 1005

Professor

All

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Document Summary

Earth is the third of 8 major planets circling a medium size star. Our sun is one of about 10^11 stars in the milky way galaxy. Bargu ates fall 2012: the milky way is one of about 10^9 galaxies in the universe. All bodies in the solar system formed from nebula. Nebula = cloud of gases and space dust: mainly hydrogen and helium. Stars convert hydrogen atoms into larger carbon and oxygen atoms. The origin of a solar system in the spiral arm of a galaxy. Our sun and its family of planets were formed in this way about 5 billion years ago. Glass: 2. 50 lead: 11. 34 mercury: 13. 54 gold: 19. 30. Layers defined by: chemical composition, physical properties. Core fe & ni inner solid outer liquid. Core is made of iron, with nickel and sulfur. *isostatic adjustment: vertical movement of earth"s crust, buoyancy of lithosphere on asthenosphere.

Related Questions

Which, if any, of the following statements is/are true?

1)Our galaxy, The Milky Way, is a member of The Local Group, whichis one of several groups of galaxies located in the VirgoSupercluster.
2)Most astrophysicists believe that our Solar System formed from animmense cloud of gas and dust about 4-1/2 million years ago.
3)Planets are believed to have formed by a process known asaccretion.
4)Two key elements in the Condensation Theory of PlanetaryFormation are 5)Conservation of Angular Momentum and CondensationNuclei.
6)The name of the second largest object in the Universe is TheSouthern Wall.
7)In our Solar System, the four jovian planets, Jupiter, Saturn,Uranus, and Neptune, are separated from the four terrestrialplanets, Mercury, Venus, Earth, and Mars, by the Kuiper Belt.
8)Our star, The Sun, is located on the Orion Arm, about 26,000light-years from the center of the Andromeda Galaxy.
9)It takes a photon of light about 4-1/5 years to travel from ourSolar System to the second closest star to Earth, ProximaCentauri.
10)The full range of human knowledge about our Universe spans about40 or 41 orders of magnitude on a spatial scale and about 13.7billion years on a temporal scale.
11)It takes a photon of light about 5-1/2 hours to travel from theSun to the orbit of the former planet Pluto.

Astronomers have observed a small, massive object at the centerof our Milky Way galaxy. A ring of material orbits this massiveobject; the ring has a diameter of about 15 light years and anorbital speed of about 200 km/s.
A) Determine the mass of the massive object at the center of theMilky Way galaxy.
Take the distance of one light year to be 9.461Ã10¹⁵m. Iwas able to get this it is 4.26Ã10³⁷kg.
B) Express your answer in solar masses instead of kilograms, whereone solar mass is equal to the mass of the sun, which is1.99Ã10³⁰. I got this to it is 2.14Ã10⁷ solarmasses
C)Observations of stars, as well as theories of the structure ofstars, suggest that it is impossible for a single star to have amass of more than about 50 solar masses. Can this massive object bea single, ordinary star? I got this it is no.
D) Many astronomers believe that the massive object at the centerof the Milky Way galaxy is a black hole. If so, what is itsSchwarzschild radius? Express your answer in meters.
E)Would a black hole of this size fit inside the earth's orbitaround the sun? The mean distance from the sun to the earth is1.5Ã10^11m.
Please solve part D and E. For part D please show equations andsolve all the way through. I worked it twice and I am getting myanswer wrong. I am afraid I am making a silly mistake.

Helium is very common in the Sun and calcium is rare. Why arehelium lines weak and calcium lines strong in the visible spectrumof the Sun?

How would a star regain its state of equilibrium if the energygeneration rate of a star were to become slightly smaller than itsequilibrium?

Why do metal poor stars have the most elliptical orbits? Fromwhere do they obtain their metals?

why do so few visual binary star systems been fully analyzedto reveal individual masses?

When we look at light curve for an eclipsing binary systemwith total eclipses, how can we tell which star is hotter?

Why do extremely cool stars look fainter than we might expectfrom their luminosities and distances?

Why can't we use solar type stars as spiral tracers? what typeof stars make good spiral tracers? why? What characteristics dothey have to perform this function?

in some old, dense stars, a few blue stars, known as bluestragglers are seen. why are blue stars unexpected in suchclusters? If stars that stick together mix their materialthoroughly when they collide, how might you explain such bluestars?

Supposed you jumped into a black hole feet first? what wouldhappen to you? what would your friends who stayed behind actuallysee?

Why are there different types of galaxies?

what is the eventual fate of the milky way galaxy? whatprocess will lead to this fate? can anything change this?

What are the processes that are responsible for the formationof an elliptical galaxy in comparison to a spiral galaxy? Whycannot galaxies evolve from elliptical to spiral and from spiral toelliptical?