The nature of time is a complex and philosophical question that has been explored by scientists, philosophers, and theologians for centuries. While there is no single, universally accepted definition of time, I can provide you with a general understanding based on scientific theories.
In the realm of physics, time is often considered as a fundamental dimension that is intertwined with space, forming the fabric of spacetime. It is a way to measure and order events and allows us to perceive and quantify the progression of events from past to present to future.
Regarding your suggestion that time exists because without it there could be no energy, it's important to note that energy and time are interconnected concepts, but one does not necessarily require the other for existence. Energy is a fundamental property of the universe, and it is through the progression of time that we observe and measure changes in energy.
According to the laws of physics, energy can exist and be transformed regardless of the presence of time. For example, energy can be stored in objects or systems, transferred from one form to another, and even converted into mass, as described by Einstein's famous equation E=mc².
However, it is worth noting that the precise relationship between time and energy is a subject of ongoing scientific research. The study of time, along with energy, is part of the broader field of physics, where theories such as general relativity and quantum mechanics aim to provide a deeper understanding of the nature of time, space, and energy.
Ultimately, the question of what time is and its relationship to energy is still a topic of investigation and debate in both scientific and philosophical circles, and our understanding continues to evolve as we gain new insights into the nature of the universe.