Power Efficiency of people?

[imported_goku]

For X amount of work people do, and X amount of work machines do, which technically uses 'more energy'? Also on the subject, people walking in 72* weather, what is the MPG rating for people?

 

[Throwmeabone]

People use more energy because of the calories the body uses for just staying alive. I don't know what you mean by MPG.

 

[Epic Fail]

2 gallons of milk = 1.42 mile

 

[imported_goku]

Originally posted by: Throwmeabone
People use more energy because of the calories the body uses for just staying alive. I don't know what you mean by MPG.

MPG, Gallons of water needed for every mile walked.

 

[imported_Tick]

Originally posted by: goku

Originally posted by: Throwmeabone
People use more energy because of the calories the body uses for just staying alive. I don't know what you mean by MPG.

MPG, Gallons of water needed for every mile walked.

We don't burn water.... How about Kiljouls per mile, or Moles Glucose per mile?

 

[Eeezee]

I burn petroleum, not water

 

[jagec]

Hmm, well, let's pull up a few figures.
First website gives me ~300 Cal/hour for walking at a 4mph pace.
That's in addition to the ~2000 Cal/day basal metabolism, but we'll ignore that for now.
Gasoline has an energy content of approximately 31,000 Cal/gallon.

So we get about 400mpg, assuming we can digest gasoline.

 

[JohnCU]

i heard friday from my electronics II teacher that people were 82% efficient, compared to the 75% of our power transistor we're studying.