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Posted by on Tuesday, January 6, 2009 at 3:59pm.

how can the chemical energy of your lunch today become the energy you need to deliver the newspapers after school tomorrow?

  • science - , Tuesday, January 6, 2009 at 4:09pm

    Chemical energy in food is converted to mechanical energy (work) performed by muscles, by means of a complex series of chemical reactions that take place in the body. Mechanical energy can also be extracted from body fat, or even muscle, during periods of fasting.

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