FUSION AND FISSION. THE SUN.
Every second, the sun converts 500 million metric tons of hydrogen to helium. Due to the process of fusion, 5 million metric tons of excess material is converted into energy in each second. This means that every year, 157,680,000,000,000 metric tons are converted into energy.
atomic number (protons)
The thermal activity of a gas is described by its temperature measurement which is really an indication of its velocity/energy.
Thermal energy is represented by the height that the upper magnet.
The upper ring has a potential energy given by PE = mgh at its drop point which is converted into kinetic energy (KE = 1/2 mv2)
As the magnet falls towards the lower magnet. The two magnets click lightly when the kinetic energy is just greater than the magnetic energy that holds them apart.
Since Kinetic Energy = Potential Energy (ignoring frictional components), the gravitational pull and mass of the upper magnet are constant, then the height needed to overcome the magnetic repelling force is proportional to that magnetic repelling force.
PE =mg x h2-h1
PE = KE = Fxh1
F=force of repulsion
.993 kg Helium
What process creates energy in the Sun?
Fusion of hydrogen into helium in the Sun’s core generates the Sun’s energy.
How long ago did fusion generate the energy we now receive as sunlight?
Fusion created the energy we receive today about a million years ago. This is the time it takes for photons and then convection to transport energy through the solar interior to the photosphere. Once sunlight emerges from the photosphere, it takes only about 8 minutes to reach Earth.
A reaction in which an atomic nucleus of a radioactive element splits by bombardment from an external source, with simultaneous release of large amounts of energy, used for electric power generation
Neutron induced in U235
Fission is Exothermic
The sum of the masses of
the resulting nuclei is less
than the original mass (about 0.1% less)
The “missing mass” is converted to energy according to E=mc2
1 - Cause another fission by colliding with a U235 nucleus
2 - Be absorbed in other material
3 - Lost in the system
If sufficient neutrons are present, we may achieve achain reaction
Each split (fission) is accompanied by a large quantity ofE-N-E-R-G-Y
A large nucleus splits into several small nuclei when impacted by a neutron, and energy is released in this process
Several small nuclei fuse together and release energy.
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