| ID: | 147 | | Title: | | Site address: | http://en.wikipedia.org/wiki/Machine | | Description: | The scientific definition of a machine is any device that transmits or modifies energy. In common usage, the meaning is restricted to devices having rigid moving parts that perform or assist in performing useful work. It normally requires some energy source ("input") and always accomplishes some sort of work. Devices with no rigid moving parts are commonly considered tools, or simply devices, not machines. | | Category: | | Pagerank: | N/A | | Link Owner: | | | Date Added: | May 07, 2007 10:09:19 PM | | Number Hits: | 0 | | |
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