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Reference Terms
from Wikipedia, the free encyclopedia


A machine is any mechanical or organic device that transmits or modifies energy to perform or assist in the performance of tasks.

It normally requires some energy source and accomplishes some sort of work.

Functioning physical machines are always less than 100% efficient.

Note:   The above text is excerpted from the Wikipedia article "Machine", which has been released under the GNU Free Documentation License.
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Matter & Energy News
February 20, 2017

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updated 12:56 pm ET