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The CNO cycle, which stands for carbon-nitrogen, is one of the processes b which stars convert hydrogen to helium. This is the dominant source of energy for stars with larger mass.
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What is the CNO cycle?
The CNO cycle (carbon nitrogen oxygen) alternately called Bethe-Weizsäcker-cycle, is one of two types of fusion reactions by which stars convert hydrogen to helium, the other is the proton proton chain.
Which stars produce most of their energy by the CNO cycle?
Stars that produce most of their energy by the CNO cycle are predominantly those with a mass about 1.3 times the mass of our Sun or greater.Our Sun, and stars comparable in mass or less, predominantly use the proton-proton cycle.
How does the extreme temperature sensitivity of the cno cycle affect the structure of stars?
It affects the internal structure of main-sequence stars because they have very high central temperatures for the extreme temperature sensitivity of the CNO cycle to fuse hydrogen into helium.
Stars with a core temperature in excess of 20 million K probably have what fusion type?
The CNO Cycle.
Is the thermonuclear fusion of hydrogen to form helium operating in the cores of low-mass stars on the main sequence?
I can't remember if it is the proton-proton chain or if it's the CNO cycle... i'm pretty sure it's the CNO cycle, but i'm not 100% sure.
Atoms that power the sun and other stars?
The most important fusion process in nature is that which powers the stars. The net result is the fusion of four protons into one alpha particle, with the release of two positrons, two neutrinos (which changes two of the protons into neutrons), and energy, but several individual reactions are involved, depending on the mass of the star. For stars the size of the sun or smaller, the proton-proton chain dominates. In heavier stars, the CNO cycle is more important. Look up CNO cycle in Wikipedia
Which nuclear reaction takesplace in sun?
Nuclear fusion takes place in our sun, specifically the proton-proton (p-p) chain variant of fusion. There is another variant, the carbon-oxygen-nitrogen (cno) cycle, which is used in much larger stars, and to a lesser degree, our own Sun (less than 2%).
In 1942 who is the chief of naval operations and commander in chief us fleet?
The Chief of Naval Operations, the top officer in the Navy's military chain of command, is the Naval representative for the Joint Chiefs of Staff. The CNO reports directly to the Secretary of the Navy.
How is the fusion done using hydrogen in the sun?
Hydrogen-1 is fused into helium-4. This happens at high temperatures - somewhere around 14 million kelvin (which, at such high temperatures, is the same as 14 million degrees Celsius, for all practical purposes). There are two main reaction chains that in stars: the proton-proton chain reaction, and the CNO cycle. I suggest you read the corresponding Wikipedia articles, if you want more details about each of the reaction chains. Anyway, in our Sun, the predominant reaction chain is the proton-proton chain reaction.
Who is the chief of navy?
The Chief of Naval Operations, or CNO, is the highest ranking officer in the US Navy. The current CNO is ADM Gary Roughead.
Does nuclear fusion occur at 15000000c?
It certainly can. It can also occur at lower or higher temperatures. 15 MK is roughly the core temperature of the Sun. At this temperature the PP chain is dominant, with the CNO cycle contributing roughly an order of magnitude less energy. At around 17 MK the two are roughly equal, and at higher temperatures the CNO cycle becomes dominant. Much below 4 MK, you're not normally going to get significant fusion (there are "cold fusion" techniques that can happen at much lower temperatures, such as muon-catalysed fusion, but these aren't net producers of energy: it takes more energy to make the muons than you can get out of the resultant fusion reaction).
Who serves as an advisor to the chief of naval operations cno?
The advisor to the Chief of Naval Operations (CNO) is the Vice Chief of Naval Operations (VCNO). The VCNO assists the CNO in his duties and responsibilities, particularly in matters pertaining to the operation and readiness of the U.S. Navy.
