Sunday, November 29, 2009

Fat of the Land (FPOTW)

Ugg... I am stuffed! All that turkey, all that food. =(   =)
Leftovers!

I was reading an article in CNN about the percentage of overweight and
obese people in the good old USA. The pundits and experts agree that 65%
of Americans are overweight, and 30% are obese.






---- Start Fermi Problem ----

If you were to liposuction the excess fat off of Americans, estimate how much you would get.

If you could burn the fat for energy, for how long could you power an average home?

---- End Fermi Problem ----

The radical Muslims could now say: "Kill all Americans, and burn them for electricity!"

2 comments:

  1. 1)"If you were to liposuction the excess fat off of Americans, estimate how much you would get."

    65% of Americans or 130 million Americans.
    Let the excess amount of fat in one of the Americans be 20kg, on average.
    Overalls, 2.6*10^9 kg.
    Or for simplify 3*10^9 kg.

    From Wikipedia:
    4.3*10^9 kg is amount of matter converted into energy by the Sun each second.

    6*10^9 kg is the mass of Great Pyramid of Giza.

    2)"If you could burn the fat for energy, for how long could you power an average home?"


    Fat contains 9 calories per gram.
    Or 1kg=9*10^3 cal
    So 3*10^9 kg=27*10^12 cal=
    =10^14 joules

    Now, an annual household energy consumption in North America is around 30 gigajoules or 3*10^10 joules.
    Lets take 10^10 joules for simplify.
    Thus you could power an average house approximately 10000 years.

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