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If the spectrum of a star shows the same absorption lines as the sun what can be said about the stars composition?
When stars form in the present Milky Way galaxy they are composed of about 71% hydrogen and 27% helium,[87] as measured by mass, with a small fraction of heavier elements. Typically the portion of heavy elements is measured in terms of the iron content of the stellar atmosphere, as iron is a common element and its absorption lines are relatively easy to measure. Because the molecular clouds where stars form are steadily enriched by heavier elements from supernovae explosions, a measurement of the chemical composition of a star can be used to infer its age.[88] The portion of heavier elements may also be an indicator of the likelihood that the star has a planetary system.[89] The star with the lowest iron content ever measured is the dwarf HE1327-2326, with only 1/200,000th the iron content of the Sun.[90] By contrast, the super-metal-rich star μ Leonis has nearly double the abundance of iron as the Sun, while the planet-bearing star 14 Herculis has nearly triple the iron.[91] There also exist chemically peculiar stars that show unusual abundances of certain elements in their spectrum; especially chromium and rare earth elements Edit : That's interesting, but it doesn't answer the question. The answer is that the star and the Sun must have the same chemical elements in their "atmospheres".
What fraction of the atmosphere's mass is below an aircraft flying at the 700 mb level?
The 700 mb level of the atmosphere is 10,000 feet in the air. This level is the second level used for measuring the atmosphere in the troposphere, so 1/5 of the atmosphere is located below it.
Are gamma rays blocked by the atmosphere?
Yes, a majority of gamma rays are blocked by the Earth's atmosphere. The atmosphere acts as a shield against the harmful effects of gamma rays by absorbing and scattering them. Only a small fraction of gamma rays from space can penetrate into Earth's atmosphere.
How does the fraction of methane in Neptune's atmosphere compare to that in Uranus's atmosphere?
Oh, that's a lovely question you have there. You see, the fraction of methane in Neptune's atmosphere is actually a bit higher than in Uranus' atmosphere. But you know, both planets have unique beauty in their own way, don't they? It's like painting two different skies with different shades of blue - each with its own charm and magic.
What contains only a tiny fraction of the atmosphere is mass?
The atmosphere is primarily composed of nitrogen (about 78%) and oxygen (about 21%), with trace gases making up only a tiny fraction of its mass. These trace gases include carbon dioxide, argon, neon, and others, which collectively account for less than 1% of the atmosphere. Despite their small proportion, these trace gases play critical roles in processes such as greenhouse gas effects and ozone formation.
What fraction of all arrests do misdemeanors comprise of?
The question is not sufficiently specific. Where and over what period?
What is the approximate mole fraction of nitrogen and oxygen in the atmosphere combined?
The approximate mole fraction of nitrogen in the atmosphere is about 0.7808, and the approximate mole fraction of oxygen is about 0.2095. When combined, the mole fraction of nitrogen and oxygen in the atmosphere is approximately 0.9903.
What is the mass percent composition of an element in a molecule?
Percentage composition= (mass of the element/mass of the molecule)*100 The fraction of the molecule's mass that comes from the element's mass
Radioactive elements comprise a majority?
Radioactive elements make up a small fraction of all naturally occurring elements in Earth's crust. Most elements are stable and non-radioactive. However, even though they are a minority, radioactive elements play important roles in various scientific, medical, and industrial applications.
What fraction of the grand canyon is dessert?
Well the chocolate valley and whipped cream hills comprise about 53 percent...
What is a unit rate in fraction?
It is a fraction in which one of the elements - usually the numerator - is 1.
What fraction of your atmosphere is Oxygen gas?
About 1/5
What fraction of the atmosphere consists of water vapor?
1/3
What is the composition for copper?
Compostion Fraction by weight 1,000000 Atomic number 29.
What fraction of water resides in the Earth's Atmosphere?
The amount of water in the earth's atmosphere is 1/3000.
What elements is not a major element of the Earth's crust?
One element that is not a major element of the Earth's crust is gold. Gold is a precious metal that is considered rare in the Earth's crust, making up only a small fraction of its composition.
What fraction of the earths atmosphere is carbon mioxide?
Earth's atmosphere is about 0.035% CO2. Since the atmosphere is just a thin layer of gas surrounding the earth, CO2 is a much, much smaller fraction of the earth itself.
