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How imperfect is the human machine

  1. Sep 13, 2014 #1

    bobie

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    If we pull/ push a weight of 10kg and dislocate it 1 meter the energy spent is 10 joules, can someone tell me roughly if 10 j is 100% can anyone tell me how much energy (calories) has been burned /wasted in excess? I suppose it can vary in different persons and by different factors, I'd like to get just a rough idea, 120%?
     
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  3. Sep 14, 2014 #2

    Bandersnatch

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    For every Joule of work, you burn 4 to 5 Joules. Google muscle efficiency for more details.
     
  4. Sep 14, 2014 #3

    bobie

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    Thanks, very helpful
     
  5. Sep 15, 2014 #4

    fedaykin

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  6. Sep 21, 2014 #5
    According to a book I'm reading, the human body is running roughly at 20% efficiency. Seeing that nothing can be at 100% efficiency (2nd law of thermodynamics) I'd say the human body is doing perfectly well.
     
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