When they run out of thermonuclear fuel in their cores. What fuel this would be varies, as more massive stars can fuse heavier elements. The absolute upper limit is iron, as fusing it absorbs energy.
Yes, The star will stop the process of nuclear fusion and run out of hydrogen and die
hope so. I would hate for the sun to stop working.
They run out of hydrogen and other fuels for nuclear fusion
Stars are not like candles, they are not burning chemically in air. The light they produce comes from nuclear fusion (the conversion of matter int energy) and therefore they can not "blow out". When all the matter for fusion is used up the stars change size and colour but eventually they stop producing light and go dark permanently.
it is quite unfair to say that having nuclear weapons with IRAN is dangerous because when pakistan is nuclear armed country and other nations are equipped with this nuclear facility because if IRAN is acquiring nuclear energy for gud purpose, then we shud not stop IRAN from achieving its energy purpose.
stop cheeting, get on with your open book!!! i dnt knw am stuck at that question aswell
No. Mainly because to achieve nuclear fusion you need mass - without it, the temperature cannot be attained to achieve nuclear reactions.
By the gravitational collapse of massive stars - once they stop producing energy.
The n.deal is a win-win situation becauce of following advantages. after a reasonable time our energy sources will be end. e.g. coal mines. than nuclear energy can be utilise as a source of energy. there is not any condition which will stop any of our on going projects.
A massive star with iron in its core will stop nuclear fusion, leading to its collapse and eventual explosion as a supernova. Iron is the element at which fusion becomes endothermic, meaning energy is no longer released in the process.
What happens here is that while the star is converting energy through nuclear fusion, the inward force of gravity is countered by (a) the gas pressure, and (b) the radiation pressure. However, once the nuclear fuel burns out, there is no more radiation pressure; and the gas pressure by itself is not enough to stop the collapse. Thus, the star will collapse - into a white dwarf, a neutron star, or a black hole, depending on the remaining mass.
be careful