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What is the critical temperature at which nuclear reactions begin?
Wiki User
∙ 13y ago
For nuclear fission reactors there is no critical temperature, though they do have a temperature coefficient which makes the efficiency of the chain reaction vary slightly with temperature. This can be negative or positive, obvously a negative coefficient is preferred and is safer.
Nuclear fusion is another matter, and very high temperatures are required in tokamaks to get fusion started
Wiki User
∙ 13y ago
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What particle is needed to begin a nuclear chain reaction?
Neutrons are the important particles of nuclear chain reactions and the reactions depend on them. The neutrons do not really start the fission, reaction, however, because the neutrons come from fission in the fuel.The material in the fuel, typically a mix of 235U and 238U, undergoes fission spontaneously. When a fission event happens, more neutrons, typically two or three, are emitted. These bounce about from atom to atom, until they cause another atom to undergo fission, releasing more neutrons to increase the rate at which atoms undergo fission.But the neutrons needed for the chain reaction are actually produced by the fuel spontaneously, and these are produce in an ongoing manner with or without critical mass. So it is not a particle that starts the chain reaction; it is the act of putting together a critical mass.
What 2 types of energy does nuclear bombs use?
Chemical energy- to begin the explosion- and nuclear energy- the main explosion.
What does water begin to do when its temperature reaches the dew point?
condense
When the temperature increases the particles of the liquid inside a thermometer begin to move faster and what else?
Friction of the particles will increase the temperature. This is how a microwave works.
When the temperature is near absolute zero what do the atoms begin to do?
The vibrate less vigorously.
At what temperature do star begin the process of nuclear fusion?
Between 10 and 15 million degrees.
Inside a prostar the nuclear fusion of hydrogen will begin when?
The core of the protostar reached an extremely high temperature
When does helium fusion begin in a star?
Hydrogen undergoes nuclear fusion to form helium at a temperature of 107 K
The lowest temperature a superconducter can work at?
0oK, or absolute zero is the lowest temperature. Superconductors have a critical temperature at which they begin to work, but it is the highest temperature, and they function as superconductors at any temperature lower, down to as close to absolute zero as they can be made to be (absolute zero is unachievable).
What particle is needed to begin a nuclear chain reaction?
Neutrons are the important particles of nuclear chain reactions and the reactions depend on them. The neutrons do not really start the fission, reaction, however, because the neutrons come from fission in the fuel.The material in the fuel, typically a mix of 235U and 238U, undergoes fission spontaneously. When a fission event happens, more neutrons, typically two or three, are emitted. These bounce about from atom to atom, until they cause another atom to undergo fission, releasing more neutrons to increase the rate at which atoms undergo fission.But the neutrons needed for the chain reaction are actually produced by the fuel spontaneously, and these are produce in an ongoing manner with or without critical mass. So it is not a particle that starts the chain reaction; it is the act of putting together a critical mass.
What are the names of the particles involve in a nuclear reaction?
If we are just considering the "basic" nuclear reaction in a "regular" nuclear reactor, the particles of interest are the uranium-235 atoms (which are fissionable), and the neutrons, which get loose and cause fissions when they are absorbed by the U-235 atoms. We could broaden this to include some other reactions, but this is a fabulous place to begin to investigate nuclear physics.
What particle is needed to begin nuclear chain reaction?
Neutron particle is needed to begin nuclear chain reaction.
When did the nuclear age begin?
1945
How hot is the core of a protostar?
The core will reach between 250,000,000 to 500,000,000'C at its stable temperature. Beforehand it will rapidly gain heat from hundreds of thousands to its stable temperature, where it can begin the process of nuclear fusion. Hope that helps!
When body temperature drops below normal do chemical reactions proceed too rapidly and do body proteins begin to break down?
No, when body temperature drops below normal the body will slow down in its functions and go into "preservation mode".
How does heat speed up decomposition?
Decomposition involves chemical reactions and as a rough approximation, for many chemical reactions happening at around room temperature, the rate of reaction doubles for every 10°C rise in temperature. The reason for this is that for chemical reactions to happen, at the smallest scale, the individual chemical molecules have to bump into one another. As molecules warm up they begin to vibrate more and the chances of them bumping in to one another increases - the more bumps that happen, the faster the reactions go.
Is a planet different than a star?
Yes. In the core of a star there is nuclear reactions taking place that burn hydrogen. Also stars are made when a cloud of gas out in space collapses under gravity. Planets are made when materials around a gravity disc of a pre-existing begin to condense in rock and ice cores
