Destroying every last bit of normal matter in the known universe would be an incredibly challenging task, even if one had access to all available energy. The reason is tied to the fundamental principles of physics, specifically the conservation of energy and the interplay between energy and matter.
According to the law of conservation of energy, energy cannot be created or destroyed; it can only be transformed from one form to another. While it is theoretically possible to convert energy into matter through processes like particle-antiparticle pair production or nuclear reactions, the reverse process of completely annihilating all matter and converting it back into pure energy is highly complex.
To annihilate matter on such a vast scale, one would need to overcome several significant challenges. Firstly, it would require an enormous amount of energy, far beyond what is currently available or even conceivable. Secondly, matter is composed of atoms, which are incredibly stable and tightly bound structures. Breaking down every atom and releasing its energy would be a formidable task.
Additionally, matter is spread out across vast distances in the universe. To completely annihilate every bit of matter, one would have to account for matter located in distant galaxies and cosmic structures. Overcoming the immense distances and logistical challenges involved in accessing and destroying matter throughout the universe would be virtually impossible.
Furthermore, there are limits to how much energy can be effectively harnessed or utilized. The laws of thermodynamics, particularly the second law, place constraints on the efficiency of energy conversion and dictate that some energy will always be lost as waste heat during any process.
In summary, while the idea of destroying all matter in the known universe might be intriguing, it is highly improbable due to the immense energy requirements, the stability of matter, the vast distances involved, and the fundamental principles of physics that govern the conservation and transformation of energy and matter.