When the star becomes a "Red giant" is when the helium flash occurs.
The helium flash only last for a couple of minutes.
As a G-type star fuses its hydrogen to helium, this helium will gather in the core. As a result, the core will contract under its own weight as hydrogen is being spent. The contraction causes an increased hydrogen fusion rate, increasing the temperature. When insufficient hydrogen remains in the core, the layers above are no longer supported by the outward pressure of radiation, and collapse on top of the core, causing it to contract further, and also initiating hydrogen fusion outside the core. At this point, the star leaves the main sequence, and becomes a red giant. At this stage, the core of the giant may reach critical density for helium fusion to initiate. Since the core is composed of mostly degenerate matter at this stage, there is no regulation of the fusion rate. Also, degenerate matter is less opaque to the energies produced than non-degenerate matter, so conducts them better.Ehr, to summarize: the helium flash occurs during the red giant stage of G-type stars.
Some stars do not develop degenerate helium cores.
The helium flash itself will take a few seconds; after that, the core of the star expands and cools down somewhat, and the star will continue burning helium in a normal (non-explosive) manner.
A helium flash occurs because the core of the star is in what is known as a "degenerate" state. This means that the core has contracted so much that the pressure of the electron shells of the atoms making up the core prevent the core from contracting further. Under normal gas conditions (i.e. NOT a degenerate state), an increase in the temperature of the core would cause an increase in core pressure resulting in the core expanding and the temperature then dropping. This state is known as hydrostatic equilibrium. With a degenerate core, the temperature increases but the pressure doesn't. This extra energy ignites the helium creating run-away nuclear reactions. This is what is referred to as a "helium flash."
The core quickly heats up and expands.
the core quickly heats up and expands
The luminosity of a low mass star goes down after helium flash. The sudden onset of helium fusion stops core shrinkage and the low-mass star will become smaller, and less luminous than it was as a red giant.
That would be called a flash flood.
a game where your creature changes/evolves throughout the game, famous evolution games are, evolution the game of life, spore, dark-spore(coming soon) and also two free flash games, monster evolution and bug evolution (but the last two defiantly aren't as good).
A flash of lightning is the result.
They are called flash floods.
The R4DS is the most popular flash cart, selling much more than any other The CycloDS evolution has onboard memory for firmware, so it works straight out of the box.
The highest temperature a butane lighter reaches is the "flash point", which is when the spark occurs to begin the flame.The flash point can reach temperatures of up to 420oC which is about 788oF.
As of PokÃ©mon X and PokÃ©mon Y, the PokÃ©mon that can learn both Flash and Headbutt are Slowpoke and its two evolutions of Slowbro and Slowking, Drowzee, Hypno, Breloom, Shroomish, Castform, Glalie, Snorunt, Eelektrik and its evolution of Eelektross, Elgyem and its evolution of Beheeyem and Furfrou.
flash point is the temperature of the fuel at which a momentary or may be a instantaneous flame occurs occurs when you introduce a source of flame over the surface of the fuel (not by contact, the introductory flame should always be above the surface of the fuel)fire point is the temperature of the fuel at which at least a 5 second flame occurs when you introduce a source of flame above the surface of the fuel.
It is called a Flash Flood.
A flood is an instance where an area that is normally dry land is covered in water. This can happen for a number of reasons. A flash flood is a flood that occurs quickly, often covering an area in minutes or seconds.
Flash flooding can occur when there is too much rain falling too fast in the desert.
A low-mass star never gets hot enough in the core to fuse helium into carbon.
12 means that the battery was disconnected with in the last 50 start cycles 55 means end of codes. flash, short pause flash, flash (12) longer pause flash,flash,flash,flash,flash, short pause, flash,flash,flash,flash,flash (55)
Flash as in camera? No. Flash as in Flash Player? No
Stars leave the red giant branch when the temperature of the core reaches about 100 millionoK and helium fusion in the core begins. The star is now on the horizontal branch. In smaller stars - this is known as helium flash. [See related question]
Auto flash, Red Eye flash, and no flash
See the answer for Where can you download Adobe Flash Player Macromedia flash player is EXACTLY THE SAME PROGRAM as Adobe flash player Adobe flash player = Macromedia flash player Macromedia flash player - Adobe flash player Repeating: Adobe flash player = Macromedia flash player Macromedia flash player - Adobe flash player
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