Solutions for Reducing Mass: What's Possible

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Is there any known way of shrinking mass?
 
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As in:

dm/dt < 0?

This happens all the time. In a naive sense, this occurs for a rocket/payload system that is accelerating through space because the rocket must expell exhaust in order to do so. A more interesting example is the mechanism that utilizes E=mc2 in a more straightforward way, such as fusion of hydrogen into helium. The consideration has the added bonus that it allows even black holes to eventually "evaporate."
 

While it may seem counterintuitive, there are actually several known ways of reducing mass. One possible solution is through nuclear reactions, where the nucleus of an atom is split, releasing large amounts of energy and reducing the overall mass of the atom. This process is used in nuclear power plants and nuclear weapons.

Another solution is through chemical reactions, where atoms can combine to form new molecules with lower mass than the original atoms. This is the basis of combustion, where fuels react with oxygen to produce energy and release byproducts with lower mass.

Additionally, mass can be reduced through physical processes such as evaporation or sublimation, where a substance changes state from a liquid or solid to a gas, resulting in a decrease in mass.

It is important to note that these solutions for reducing mass are limited in their applicability and may not be feasible or practical in all situations. Furthermore, the conservation of mass principle states that mass cannot be created or destroyed, only transformed from one form to another. So while mass may appear to be reduced through these processes, it is actually just being transformed into other forms of energy or matter.
 
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
If we release an electron around a positively charged sphere, the initial state of electron is a linear combination of Hydrogen-like states. According to quantum mechanics, evolution of time would not change this initial state because the potential is time independent. However, classically we expect the electron to collide with the sphere. So, it seems that the quantum and classics predict different behaviours!

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