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- subcritical - a mass or arrangement of fissionable or fissile material unable to sustain a neutron chain reaction. It can provide a fixed amount of neutron multiplication from a neutron source, but after removal of the neutron source the chain reaction rate drops exponentially.
- critical - a mass or arrangement of fissionable or fissile material capable of sustaining a constant neutron chain reaction. No increase or decrease. (Nuclear reactors operate at critical)
- supercritical - a mass or arrangement of fissionable or fissile material capable of not only sustaining a neutron chain reaction, but once initiated the chain reaction rate rises exponentially. (Nuclear fission bombs explode when made supercritical)
A nuclear fission bomb must have 2 of these states: subcritical (so that it can't explode until desired) and supercritical (so that it explodes with an effective yield). This requires a rapid "assembly" system using conventional explosives to rearrange the fissile material from subcritical to supercritical in about 1ms. A neutron source starts the chain reaction and the explosion completes in about 1 microsecond.
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What is meant by supercritical and how does it relate to making a nuclear bomb?
A subcritical mass cannot sustain a nuclear chain reaction, it dies exponentiallyA critical mass can sustain a nuclear chain reaction, but it remains constant neither increasing nor decreasingA supercritical mass not only sustains a nuclear chain reaction but it increases exponentially until the mass explodesA nuclear fission bomb must become supercritical at some time in order to explode.
What are the contributions of dr Abdul qadeer khan in physics?
Dr. Abdul Qadeer Khan is a Pakistani scientist known for his role in Pakistan's nuclear weapons program. He is credited with leading the team that successfully enriched uranium to develop Pakistan's first nuclear bomb in 1998. While his work was primarily in the field of nuclear technology, his contributions in physics relate to the development of nuclear reactors and weapons technology.
How do neutrons electrons and protons relate to nuclear energy?
These are the constituents of atoms. Nuclei are made up of protons and neutrons. Useful nuclear energy is only obtained from a few nuclei which can be made to fission and release energy. The two main ones are Uranium235 and Plutonium239.
Does Thermal energy and nuclear energy relate?
In a nuclear power plant, the reactor produces nuclear energy which transforms to thermal energy, and this is then used to produce steam which is used in a conventional staem turbine/generating set to produce electricity
Someone who is on equal standing with you?
A peer is someone who is on equal standing with you, typically in terms of age, background, or experience. Peers often share similar interests and experiences, making it easier to relate to and connect with one another.
What is meant by supercritical and how does it relate to making a nuclear bomb?
A subcritical mass cannot sustain a nuclear chain reaction, it dies exponentiallyA critical mass can sustain a nuclear chain reaction, but it remains constant neither increasing nor decreasingA supercritical mass not only sustains a nuclear chain reaction but it increases exponentially until the mass explodesA nuclear fission bomb must become supercritical at some time in order to explode.
How does the nuclear bomb relate to the atom?
It gets its energy from the atomic nucleus.
How does the sun relate to energy?
The sun's energy is produced by nuclear ENERGY!!! im in school..lol
How do nuclear fuels relate to environmental issues?
Nuclear fuels is not only bad for us, but for the enviornment. Some nuclear plants dump nuclear waste in rivers, oceans, lakes and ponds. This can kill and injure living organisms including us. It is not even good to bury it in the ground. Nuclear waste has to be specially desposed.
How may you define strategy and relate your definition to the concept of knowledge in the making?
define strategy
Does prostitution relate to a moral or social value?
Prostitution is a social value, which can be seen to be a coping mechanism for men in order for the nuclear family to exist.
How does the nucleolus function relate to making proteins inside a cell?
It makes the ribosomes which make proteins.
How can cereal relate to mixtures and compound?
They are not
How does numbers relate daily life?
In our daily lives we interact with numbers when making calculations and timing.
Who works with x-rays radiation nuclear medicine ultrasound?
Radiographers and radiologists, and scientists.
How does the coordinate rule for making two similar shapes relate to the scale factor?
corresponding angles are the same size
What are the contributions of dr Abdul qadeer khan in physics?
Dr. Abdul Qadeer Khan is a Pakistani scientist known for his role in Pakistan's nuclear weapons program. He is credited with leading the team that successfully enriched uranium to develop Pakistan's first nuclear bomb in 1998. While his work was primarily in the field of nuclear technology, his contributions in physics relate to the development of nuclear reactors and weapons technology.
