In particle accelerators, protons collide, leading to energy conversion and the creation of new particles, adhering to the conservation of energy principle. The discussion highlights the misconception that energy is merely an abstract concept, emphasizing its physical reality in processes like particle collisions. Participants argue that energy manifests in various forms, such as kinetic energy and electromagnetic radiation, and is integral to understanding quantum mechanics. The debate also touches on the complexities of defining "physical" in the context of energy and particles, with some asserting that energy is as physical as mass. Ultimately, the conversation clarifies that energy is not just a mathematical quantity but a fundamental aspect of physical interactions in the universe.