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Does a low mass or high mass sequence star have higher fusion rate during main sequence life?
A high mass star.
The temperature and density of the stars core are at the levels necessary to sustain the energy production that supports the remainder of the star. A reduction of energy production would cause the overlaying mass to compress the core, resulting in an increase in the fusion rate because of higher temperatures and pressure. Likewise, an increase in energy production would cause the star to expand, lowering the pressure at the core.
Thus the star forms a self regulating system in hydrostatic equilibrium that is stable over the course of its main sequence lifetime
The most massive stars may remain on the main sequence for only a few million years, while smaller stars may last for over a trillion years.
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What else can I help you with?
Which tides are higher then normal during a high tide low or high tides and why?
do you mean spring tide
A star of five solar masses would reach the main sequence quicker or slower than the sun?
A star reaches "main sequence" when it starts converting hydrogen into helium. This occurs, when the temperature of the core reaches about 10 million kelvin. When this happens depends a lot on the rate of accretion of matter onto the star. Larger stars would have to amass large quantities of hydrogen quicker than smaller mass stars to gain their size before becoming main sequence stars. Difficult to answer, but a "best guess" would put the high mass star first.
The energy source of stars is primarily associated with?
The energy source of stars is primarily associated with nuclear fusion, where hydrogen atoms undergo fusion reactions to form helium, releasing a tremendous amount of energy in the process. This process occurs in the core of stars, where high temperatures and pressures allow fusion to take place.
On what grounds are astronomers able to say that the sun has about 5 billion years remaining in its main sequence stage?
We can crunch numbers. The sun's energy output can be calculated with a high degree of accuracy, and its mass can be calculated accurately as well. We know how much energy a fusion reaction (the proton-proton reaction, for instance) releases. It's just a big numbers game, but one we can play with a high degree of certainty.
Why doesnt the helium currently in the suns core undergo fusion?
The helium in the Sun's core does not undergo fusion because it primarily consists of helium-4, which is a product of hydrogen fusion. While temperatures and pressures in the core are extremely high, the conditions required for helium fusion—such as even higher temperatures (around 100 million Kelvin) and sufficient density—are not met until much of the hydrogen has been fused into helium. Helium fusion, known as the triple-alpha process, will occur later in the Sun’s life cycle, once it exhausts its hydrogen fuel.
Which stars have convective cores?
Main sequence stars with masses greater than about 1.3 times that of the Sun have convective cores. This includes stars like our Sun and more massive ones. During the main sequence phase, nuclear fusion occurs in the core of these stars, generating energy that drives convection in their interiors.
Which conditions are required to form 4 2he during the fusion reaction in the sun?
For 4 helium nuclei to form during the fusion reaction in the sun, high temperatures (around 15 million degrees Celsius) and high pressures are required to overcome the electrostatic repulsion between the positively charged nuclei and facilitate the nuclear fusion process. Additionally, a sufficient amount of hydrogen nuclei (protons) must be present to undergo the series of nuclear reactions that eventually lead to the formation of helium.
How come fusion needs hydrogen instead of other elements?
Hydrogen is the simplest and lightest element, which makes it easier for fusion reactions to occur at high temperatures and pressures. Additionally, hydrogen has a single proton in its nucleus, making it more likely to overcome the electrostatic repulsion between positively charged nuclei during fusion. Other elements have larger nuclei with more protons, requiring higher temperatures and pressures to initiate fusion.
What is the by-product of nuclear fusion?
The main by-product of nuclear fusion is helium, which is formed when hydrogen atoms combine under high temperatures and pressures. Additionally, energy in the form of electromagnetic radiation, such as gamma rays, is also released during the fusion process.
Nuclear fusion requires extremely high?
Nuclear fusion requires extremely high temperatures, and pressures.Nuclear fusion requires extremely high temperatures, and pressures.Nuclear fusion requires extremely high temperatures, and pressures.Nuclear fusion requires extremely high temperatures, and pressures.
How often is energy released during nuclear fusion?
Energy is released continuously during nuclear fusion, as atoms combine to form heavier elements. This process occurs at extremely high temperatures and pressures, causing a constant stream of energy to be generated.
Which tides are higher then normal during a high tide low or high tides and why?
do you mean spring tide
Why does the temperature stops rising during melting and boiling point?
Because the latent heat of fusion and latent heat of vaporization are very high
Why it is more difficult to start a fusion reaction than that of fission reaction?
Fusion reactions require much higher temperatures and pressures to overcome the Coulomb barrier between atomic nuclei and achieve fusion. Additionally, controlling and sustaining the high temperature plasma for fusion is technically challenging and expensive compared to the relatively simpler process of inducing fission reactions with neutron bombardment.
What is the main sequence on the Hertzsprung-Russell diagram?
The main sequence on the Hertzsprung-Russell diagram represents the stage in a star's life when it is undergoing nuclear fusion of hydrogen into helium in its core. Stars spend the majority of their lifetime on the main sequence, where they maintain a stable balance between inward gravitational pressure and outward radiation pressure. The main sequence runs diagonally from high temperature, high luminosity stars (top left) to lower temperature, lower luminosity stars (bottom right).
What is the energy density of fusion fuels and how does it compare to other energy sources?
The energy density of fusion fuels is very high, meaning they can produce a lot of energy in a small amount of fuel. Fusion fuels have a much higher energy density compared to other energy sources like fossil fuels and even nuclear fission. This makes fusion a promising and efficient source of energy for the future.
A star of five solar masses would reach the main sequence quicker or slower than the sun?
A star reaches "main sequence" when it starts converting hydrogen into helium. This occurs, when the temperature of the core reaches about 10 million kelvin. When this happens depends a lot on the rate of accretion of matter onto the star. Larger stars would have to amass large quantities of hydrogen quicker than smaller mass stars to gain their size before becoming main sequence stars. Difficult to answer, but a "best guess" would put the high mass star first.
