Nuclear Physics

If it is related to Nuclear studies, then the answer would be fusion.

No, hydrogen does not fission. Fission only occurs in heavy elements that are well past the peak in binding energy per nucleon (where binding energy per nucleon is decreasing), and fusion can only occur in light elements which are in the portion of the binding energy curve where binding energy per nucleon is increasing. When you fission a heavy element or fuse light elements, the product nuclei have higher binding energies per nucleon than the original element. This is where the energy release comes from. Check out the Wikipedia article on nuclear binding energy.

The decay of gold-202 into mercury-202 is an example of beta-minus decay. In this process, a neutron in the gold nucleus is converted into a proton, releasing an electron (beta particle) and an antineutrino. This results in the transmutation of the element from gold to mercury.

The sun's surface area is 4pi r2 = 4pi (700 Mm)2 = 6.1575E18 m2

An electron can reach zero velocity by experiencing a slowing force, such as friction, that opposes its motion. Alternatively, if an equal and opposite force acts on the electron to stop its movement, it can also reach zero velocity.

The procedure you are referring to is called a bone scan. Radioactive substances are injected into the body and accumulate in areas of high bone activity. This allows for the detection of abnormalities in the bones through the emission of radioactive particles and subsequent imaging.

Advantages of nobelium: It is used in scientific research to study nuclear properties. Disadvantages of nobelium: It is highly radioactive and has a short half-life, making it difficult to study and work with.

Its an arbitrary designation, used, sometimes, by convention. We could just as easily have used parent-child or father-son. In fact, they are also called progeny or simply decay products. To be honest, I don't know the origin. I suppose it might be like why we call sea-faring vessels "she".

Supernova nucleosynthesis is the process where new elements heavier than iron are created through nuclear fusion when a star goes supernova. During the "normal" life of a star, it fuses hydrogen into helium, and also fuses lighter nuclei together to make heavier nuclei, at least up through iron. But after the star completes the fusion of much of its bulk into iron, it no longer continues to function as a fusion engine. The fusion processes up through those that produce iron are all exothermic, and this released energy sustains further fusion throughout the life of the star. Toward the end of its life, the star can no longer operate the "regular" way it was in normal stellar nucleosynthesis. Recall that fusion is releasing huge quantities of energy and trying to "blow up" the star, but massive gravity keeps everything together. These two forces, fusion and gravity, operate at equilibrium. After exhausting most of it fuel creating iron, gravity wins and the star collapses. This collapse adds to the star's energy, and the collapse will add tremendous quantities of heat to the stellar plasma. This heat will provide energy for the endothermic fusion reactions that create the trans-iron elements and the star will go supernova, if it is of sufficient mass. With all the extra heat provided by the collapse of a sufficiently massive star, the fusion engine will be jump started. The heat-consuming fusion reactions that create the trans-iron elements will have the energy they need to drive them, and the supernova will create lots of material with nuclei heavier than iron. Additionally, this material will be blown across the universe to fertilize other newly forming solar systems. Links are provided below for more information.

Light waves are electromagnetic waves that can propagate through vacuum since they do not require a medium for transmission. Sound waves, on the other hand, are mechanical waves that require a medium (such as air, water, or solids) to propagate because they rely on the particles in the medium to transfer energy from one point to another.

Rutherford said the deflection of an alpha particle was like firing a bullet at tissue paper and having it bounce back. This analogy conveyed the unexpected result that particles were being deflected backwards, suggesting the presence of a concentrated positive charge in the atom's nucleus.

An eighth.

I don't know how you arrived at that conclusion. But let say you're correct and there are some scientist that resort to circular reasoning; the finding will surely be debunked by other scientist and the original scientist will surely be disgraced. This is what separate evolution from creation; Creation is based on the supernatural and the faithful should believe the inerrancy of the Bible no matter what.

Critical is that point when the population of fission events is neither growing nor decreasing, and that it is sustained by its own means. In this state, on a large scale statistical basis, exactly one neutron produces one fission, which goes one to produce one neutron, which goes on to produce one fission, and so on and so forth. Subcritical is the state where that population is decreasing, and supercritical is where that population is increasing.

Criticality is also related to power output, as the number of fission events is directly tied to energy or power output. When you ramp a nuclear reactor up in power, you go slightly supercritical while you increase the population, and therefore the energy output, but once you achieve your target power, you let your moderator step in and modulate the power in a self-modulating cycle. Similarly, as you trim power down, you go slightly subcritical while you decrease the population, and then you let the moderator kick back in, that is, unless you lose control and you initiate a trip/scram, taking the reactor to shutdown, which is way-way-subcritical.

An alpha particle can be written as ¸He«+ (Sorry, but it will not print properly on this answer page. The notation should be a superscript 4 over a subscript 2, followed by He, and then a superscript 2 over a subscript 2, followed by a superscript + sign).

The sun produces energy via nuclear fusion. Electromagnetic energy in the form of light travels through the vacuum of space to reach earth via what we call radiation.

No, the half-life of a radioactive isotope is a constant property of that particular isotope and does not change as it decays. The half-life is defined as the time it takes for half of the atoms in a sample to decay. Once set, the half-life remains constant regardless of how many atoms have decayed.

Radon-198 does not decay via beta decay. It is thought to decay by alpha decay, but that is not certain. The equation would be ...

86198Rn -> (Alpha, T1/2 = 86 ms) -> 84194Po + 24He2+

Fast neutrons have high kinetic energy, making them less likely to interact with the nucleus compared to slow neutrons. The high energy of fast neutrons means they often pass through the nucleus without being captured. As a result, fast neutrons are less effective in inducing nuclear reactions compared to slower neutrons.

X-rays take more energy to generate compared to microwaves. This is because x-rays are a form of ionizing radiation that requires higher frequencies and more powerful equipment to produce, whereas microwaves are a form of non-ionizing radiation that typically require less energy to generate.

Linear decay is a reduction in a value or quantity at a constant rate over time. In the context of machine learning or reinforcement learning, it can refer to a linear decrease in a parameter, weight, or value over a specified number of steps or episodes. Linear decay is often used to gradually decrease the impact of certain factors or actions in a model to help stabilize or optimize its performance.

Breeder nuclear fission produces more fissile material than it consumes, while conventional nuclear fission produces energy without producing additional fuel. Breeder reactors can create more fuel (like plutonium) for use in other reactors, making them potentially more efficient in terms of fuel usage.