what effects determine the size of a star
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General Astronomy/Print version A Star's Size. A star begins its life in a contracting nebula of gas and dust. As the density of the material increases under the influence of gravity, compression heats the material. If the material gets hot enough, hydrogen atoms begin fusing together to form helium atoms, and a star is born. A star will spend most of its life, called the main sequence phase, fusing hydrogen into helium. Click the image to see the animation. It's logical that a large nebula (one with a large amount of mass) will form a large star, and a small nebula will form a small star. However, in addition to a star's initial mass, a star's size also depends on the balance between the inward pull of gravity and the outward push of the energy produced by fusion. The entire sequence of a star's evolution can be described in terms of the changing balance between these two opposing forces.
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What determines the color of a star other than temperature? The temperature of a star depends on the size of star. The smaller stars have low temperature due to low gravity and pressure. The massive stars have larger gravity and pressure, the burning rate of fuel is also larger which corresponds to higher temperature.
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In addition tax depreciation exceeded book Angel's hypothetical tax expense in its reconciliation of its income tax expense is: A. $340,000 B. $331,500 C. $314,500 D. $306,000 TarHeel Corporation reported pretax book income of $1,000,000. During the current year, the net reserve for warranties increased by $25,000.
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The Life Cycles of Stars And its temperature depends, again, on how much gas and dust were accumulated during formation. The more mass a star starts out with, the brighter and hotter it will be. For a star, everything depends on its mass. Throughout their lives, stars fight the inward pull of the force of gravity. It is only the outward pressure created by the nuclear reactions pushing away from the star's core that keeps the star intact. But these nuclear reactions require fuel, in particular hydrogen.
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Abu Simbel Abu Simbel When you see images of Ancient Egypt in print one image is often shown regularly—the temples known as Abu Simbel. This site is a popular tourist attraction and remains a popular destination. Thousands of visitors eagerly travel to see the…Read more Abu Simbel ›
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Why Your Muscles Get Sore: Delayed Onset Muscle Soreness (DOMS) and Exercise The question is whether or not muscle soreness has anything to do with muscle growth, though. Repeated bout is well and good, but it doesn’t answer that question. From the looks of things, DOMS and actual muscle growth don’t have much to do with each other.
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- Individual stars can also lens light, although this effect, called gravitational microlensing, is much more subtle and can only be detected by measuring how the lensing effect increases the source's brightness.
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- A star is “in hydrostatic equilibrium” when it is not collapsing or expanding. Inside a star the weight of the matter is supported by. a gradient in the pressure. If the pressure on the top and. bottom of a layer were exactly the same, the layer. would fall because of its weight. The difference between pressure times area on the top. and the bottom balances the weight.
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The Life Cycles of Stars: How Supernovae Are Formed Life Cycles of Stars. A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born.
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Stars Stellar Mass and Fusion. The mass of a main-sequence star determines its core pressure and temperature. Stars of higher mass have higher core temperature and more rapid fusion, making those stars both more luminous and shorter-lived.
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- Gravity is a function of mass. It is the enormous gravitational influences that causes nuclear fusion within stars. Explanation: If you accept, as you must, that gravity is the causal factor of nuclear fusion in all stars then you can infer by extension that the larger the star, the greater the mass; the greater the mass, the greater the gravity; the greater the gravity, the faster the rate of nuclear fusion.
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- Star sizes can also be found (less accurately) from the luminosity and the flux. Recall from the magnitude section above that the luminosity = [4 p ×(star radius) 2 ] × [ ×(star's surface temperature) 4 ], where is the Stefan-Boltzmann constant.
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Church of God News The name of the star is Wormwood. A third of the waters became wormwood, and many men died from the water, because it was made bitter. A large comet hitting the earth would also seem to have similar effects to that of a medium-sized asteroid.
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Star For stars with metallicity similar to the Sun, the theoretical minimum mass the star can have and still undergo fusion at the core, is estimated to be about 75 M J. When the metallicity is very low, however, the minimum star size seems to be about 8.3% of the solar mass, or about 87 M J.
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- This process links the gas temperature within the protostar to the gas density. The pressure exerted by a gas depends on both the temperature and the density of the gas—for an ideal gas, which describes fully-ionized hydrogen and helium, the pressure is equal to the temperature times the number density of particles.n fact, the photospheric temperature changes very little as a protostar shrinks in size. The reason is that the photosphere is not at a fixed fraction of a radius within a star. Its position is set by the ability of light to freely escape from the protostar, which depends on both the density and temperature of the gas.
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Star Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities produces a plot known as a Hertzsprung–Russell diagram (H–R diagram).
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The Largest Stars in the Universe Star types from left to right: a red dwarf, our Sun, a blue dwarf, and R136a1 (hypergiant). Where star sizes are measured by radius, from centre to surface, and where 1 solar radius is equal to that of our Sun (km) – R136a1’s radius is 35.4 times greater than the Sun (approximately 24.8 million km).tar types from left to right: a red dwarf, our Sun, a blue dwarf, and R136a1 (hypergiant). Where star sizes are measured by radius, from centre to surface, and where 1 solar radius is equal to that of our Sun (km) – R136a1’s radius is 35.4 times greater than the Sun (approximately 24.8 million km).
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The Visual Magnitude Scale The Visual Magnitude Scale. Visual brightness of stars, planets and other astronomical objects is based on the visual magnitude scale (Vo). Every integer increase in magnitude represents a 2.5 increase in brightness. So the Sun is 6 trillion times brighter than a 6th magnitude star, which in turn is 4 billion times brighter than a 30th magnitude star-the limit of the Hubble Space Telescope. 1  Magnitude (Vo). 2  Object or Limit. - 3 27.
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Why do high and low mass stars evolve differently as they become red giants? That is why they are closer towards the red side of the spectrum. Eventually the fusion of heavier elements will cause the formation of iron in most stars and the fusion process can't continue. Gravity then takes over and causes the star to collapse inward causing the material to rebound into what is a type 2 supernova. The only difference really is that with smaller stars like the sun the fusion won't continue until there is iron, but rather the star will blow off outer layers since the star is not big enough and will leave behind a white dwarf.
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- INCOME TAX IMPLICATIONS OF LONG-TERM PER DIEM Long-term travel – income tax 5/3/00 - 1 - 04/28/04 P er diem and other travel expense payments for most employees are nontaxable.ecause the total time it is expected the employee will be assigned to thislocation will exceed one year, all per diem becomes taxable at this location starting with thethird month.We have discussed this issue with the IRS and the following summarizes the IRS comments onthe one-year rule and taxable per diem.
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- The color of a star is primarily determined by its _____. composition size apparent brightness age surface temperature.The color of a star is primarily determined by its TEMPERATURE.he color of a star is primarily determined by its _____. composition size apparent brightness age surface temperature. The color of a star is primarily determined by its TEMPERATURE.
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- The surface gravity of a neutron star is millions of times greater than the surface gravity of the Earth. The tremendous weight causes the crust to shift and contract suddenly, a starquake.he idea of a neutron star was developed in 1939 when calculations were made of a star that was composed solely of degenerate neutrons.
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Star Giant stars have a much lower surface gravity than do main sequence stars, while the opposite is the case for degenerate, compact stars such as white dwarfs. The surface gravity can influence the appearance of a star's spectrum, with higher gravity causing a broadening of the absorption lines.
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Applied Casimir Effect You can now populate stars far from your starting constellation. However, to do this will require effort at all levels of the society. By creating an official program and stressing the need to sacrifice small comforts in service of a larger cause, some of the discontent caused by colonization can be minimized. Trivia Edit The Casimir Effect is a phenomenon in quantum field theory, where physical forces arise from a quantized field, similar to magnetic force.
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Spectral Classes This is the temperature of a black body having the same size and luminosity as the star and is determined by Stefan's Law. The variations in spectral lines for different stars are due primarily to the difference in temperature of the outer layers of gas in the star.
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- Astronomers classify stars based on their age, color, and brightness. These characteristics help them identify and understand the different kind OS stars. A stars surface temp … erature determines the amount of visible light given off its brightness and the color we perceive the star to be. new stars are white-blue, older ones yellow (our Sun), oldest ones black (like a black hole if they are really big when babies). The color also depends on the size of t … he star; but that is another topic.