What Time is It?

It is a little now. Before I meet Honduras, Central American friend Leticia, I ask if she will arrive in North America or Latin America. Laughing, she answers, "Of course, Lara Naratina." This means that she will be late. The concept of time in Latin America is quite different from the concept of time in North America. The pace of life in America is fast. Fast food restaurant, overnight delivery service, shuttle service, instant cash machine, fast weight loss program, and even instant rice.

Know the time now: Most of us think it is easy to say when it happens, but it is not so. It is difficult to define. I can not see or touch time literature, but I can only see the impact. We humans grow older, trees grow, buildings collapse. If you need to send content before the deadline, I feel the pressure of time. It will be needed somewhere at a certain time. So time is not watching our clock. Hence, time can be defined as the four dimensions of the universe and can not be defined as upper, left, and back directions of other three dimensions. Therefore, space and time are related to each other. Without space, time can not exist and there is no space. We say that any events occurring in the universe must include time and space. According to Einstein 's special relativity theory, when object speed approaches the speed of light, time collapses or decelerates.

Objects appear both spatially and temporally, but abstract entities (classes, attributes, relationships etc) are invisible. Then, what does space and time mean? Can it be used as a foundation of things? Is the spatiotemporal entity itself somehow shaped, or must it exist before other entities? How are they defined? For example, if time is defined as "rate of change", must there always be changes to exist? Classical philosophy recognizes many reasons, including the future of the theory of purpose. In the special relativity and field quantum theory, the concepts of space, time and causality are mixed, and the temporal order of causal relationships depends on who is observing them. Since the law of physics is temporally symmetrical it can also be used to describe the time to go backwards.

The time direction is the direction of causality, and this direction always influences the cause from the past to the future, so time causal theory is often used to argue that past processes are impossible. An important objection to David Lewis is that the direction of time can be defined as the direction of a typical causal relationship, not the direction of causality. Can you explain past assumptions more reasonably? Below are some of the competitive answers to this question. (1) Initial low entropy is just a crude fact - there is no explanation of causality. Physicist Richard Feynman suggested doing this. (2) Physicists Walther Ritz and Roger Penrose oppose preliminary facts that can not be understood saying that they need to look for some basic time asymmetric rules to explain early low entropy .