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Why do type 2 supernovae occur in massive stars when the core reaches a critical mass of iron?
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How is it the super novas after the big bang didn't form black holes but rather elements?
There are two explanations. First, when a massive star forms a black hole, usually only a small portion of the star's mass actually goes into the black hole. Most of the rest is blasted away in a supernova, enriching the surrounding space with heavier elements. Second, there are also pair-instability supernovae. Such supernovae occur in extremely massive stars with a very low content of heavier elements, which likely existed in the early universe. Pair-instability supernovae will blow away the entire star, leaving behind no black hole or neutron star remnant.
When does supernova occur?
If two stars begin to orbit. However, novae are more common that supernovae, so you can't really say if the result of a binary will be a nova or a supernova.
What happens when a substance reaches its saturation point?
A change of state will occur.
Nuclear fission can occur in?
A critical assembly of fissile material
In what region of the Milky Way Galaxy would you expect to find Type I supernovae Why?
Unlike the other types of supernovae, Type Ia supernovae generally occur in all types ofgalaxies, including ellipticals and they show no preference for regions of current stellar formation - they can occur anywhere in the Milky Way Galaxy.The reason for this is that Type 1 supernovae occur when the remnant of a small star (a white dwarf) accreets enough mass (by gas capture from, or merger with another star) to exceed the Chandrasekhar limit of about 1.38 solar masses. When this mass is exceeded carbon fusion is reignited in the stellar core and the star explodes and as white dwarf stars are to be found everywhere in Galaxies and Globular clusters, the potential for Type 1 supernovae is universal. That said, obviously you would not expect to find White Dwarf stars in current star forming areas (because the dwarf forms at the end of a stars main sequence life). However Galactic rotation mixes old stars with new stars relatively quickly and this separation rapidly blurs.
Where are supernovae?
Supernovae are massive explosions that occur when a star uses up its gas and explodes so they will only occur once a star has died.
How is it the super novas after the big bang didn't form black holes but rather elements?
There are two explanations. First, when a massive star forms a black hole, usually only a small portion of the star's mass actually goes into the black hole. Most of the rest is blasted away in a supernova, enriching the surrounding space with heavier elements. Second, there are also pair-instability supernovae. Such supernovae occur in extremely massive stars with a very low content of heavier elements, which likely existed in the early universe. Pair-instability supernovae will blow away the entire star, leaving behind no black hole or neutron star remnant.
What is the definition of critical angle?
The definition of critical angle is the angle of incidence that refraction can still occur.
What happens when mendelevium reaches 20oC?
Any event occur.
When do solstices occur each year?
The Solstices occur each year when the Sun reaches its northernmost apparent position, and again when it reaches the southernmost apparent position. These occur at midwinter and midsummer. This year, (2011), 21 June and 22 December.
When does supernova occur?
If two stars begin to orbit. However, novae are more common that supernovae, so you can't really say if the result of a binary will be a nova or a supernova.
What happens when a substance reaches its saturation point?
A change of state will occur.
Nuclear fission can occur in?
A critical assembly of fissile material
What Critical changes that occur at all stages of life?
hi
In what decade did the massive northern movement of African Americans occur?
1920s
Sublimation and deposition can occur at all temperatures at or below which?
The Critical Point
What critical step in photosynthesis do photochemical reaction occur?
The splitting of water
