survival net

By admin, June 4, 2007 6:39 pm

survival net
If you look at a human being as a simple machine – what is the net effect of a human life?

If he looked at a human being in the abstract, as a simple input output type machine – what would we do? For example, consider placing a newborn human being in an empty box, and provided that basic raw materials necessary for their survival. Totally his life, to keep track of all "inputs" of matter and energy that goes into a human being and all the "products" of matter and energy out. Obviously, the energy that goes in must equal what comes out (including energy stored in the baby when he entered). But what would be the "net changes" to the composition of matter and energy after passing by this "human machine"?

The form of your question, and the simplicity of the model, we suggest that they want a physical, rather than a philosophical answer. Therefore, we go physical. . . What a way of life in general, needs to sustain life, in physical terms, is the energy and matter, but also to increase (or at least maintain) * * In order itself the cost of their environment. More specifically, the maintenance of order in itself has to increase the "disorder" in the surrounding space. The physical quantity used to describe the amount of this "disorder" is the entropy. It is well known in thermodynamics that in any closed system, entropy can only increase. It is known as the "law of thermodynamics. So, a system of life has to export chaos import and order, to maintain its high level of organization. In a manner of speaking, is that the import of negative entropy, "which in physical terms is the same as exporting chaos (entropy increasing in the surrounding space). In fact, a living system, or has to be exposed to an energy source orderly (the sun) or for more orderly exchange materials (food) for less orderly (droppings). In a hypothetical region of space where the temperature is the same everywhere, the heat (or any other form of energy) can not flow. It would require regions of higher heat content and lower in order to flow. Thus that no matter how hot the region is (ie, no matter how much energy there), none of the energy available to do the job. No machine can be placed anywhere in the flow of energy use, because no such flow. And this is exactly what the entropy is a measure of! Entropy is a measure of the lack of availability of AA in the energy of a system to do the job. You will find a definition in the dictionary, but it's hard to understand, because it can not be measured by any measuring device. The bottom line is that a living system that the exchange of matter and energy with their environment, but contribute to the entropy overall. In the case of a living system in a box, the material that comes in is less entropic than the material out of the box. Fortunately, we, the people who can not live in a box, we have the sun, which is the source of energy, entropy, but also negative, you need to sustain life. The entropy of the Sun itself, however, increases while radiating towards us. This entropy change is key to understanding the "net change" that you described. Note, however, that this is a simplistic description. Life is a complex phenomenon, with the life of creatures in an ecosystem highly intertwined and interdependent. It all begins with the Sun, however. And, unlike many other creatures, humans tend to organize not only your own body, but also its environment, which imposes a heavy burden in terms entropy exported abroad. Consider the amount of fossil fuels we consume ….

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