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If you don't believe in Evolution, then why do you drive an SUV?



 
 
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  #111  
Old January 23rd 08, 02:23 PM posted to rec.bicycles.misc,alt.planning.urban,rec.bicycles.soc,rec.bicycles.rides,uk.rec.cycling
George Conklin
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Posts: 260
Default If you don't believe in Evolution, then why do you drive an SUV?


"Tadej Brezina" wrote in message
...
George Conklin wrote:

"Tadej Brezina" wrote in message
. ..

David Kerber wrote:


In article ,
says...


I am talking about oil energy required, not food energy. It takes


roughly

ten units of oil energy to get one unit of food energy into your body.
Farming, fertilizer, transportation, cooking, cleaning take lot of


energy.

For ideal cases, a bike may burn as much energy as a very efficient


small

car. For head winds and other non-ideal conditions the equivalent

MPG
drop down into the range of other cars.


So if I go on a ride and burn 600 kCal of energy over and above what I
would burn driving that same 30 miles or so, I would use 6000 kcal of
oil energy? Do you realize just how little gasoline it takes to

account
for that much energy? My 30 mpg car would burn approx 1 gallon of
gasoline to go that distance, which is way more than 6000kCal.

After looking up the numbers, here's what I found:

According to the DOE, 1 (US) gal of gasoline provides approx 124000
BTU's of energy (an average across all common grades). 1 BTU is approx
252 calories (251.9958 according to my converter), so 1 gallon of
gasoline provides approx 31248000 calories, or 31248 kCal. So

accepting
for the sake of argument your assertion that 1 cal of food energy takes
10 cal of oil energy, I would burn about 5 times as much gasoline

energy
to drive 30 miles as I would to ride my bike that same distance. So
your math is rather off...

Hey don't be so hard on Jack, he's just doing calculations according to
"normal research these days"!

Tadej



Part of smart growth buildings these days in the USA is to include
showers, clothes washing services and chaning rooms in eco-smart

buildings
so bike riders can enter the business world in proper clothing. Europe

has
many fewer hot days than we do in the southern part of the USA.


Nice post Conk, nevertheless wrong location of the thread.
Yes you are probably true regarding moist and heat in the south. But
please do not compare apples and pears. Europe is not of singular
dimension, it has quite a respectable N-S extension and has very hot
places in the south too.
So compare e.g. New Orleans to Napoli or Boston to Hamburg.


New York is really opposite Madrid on the maps.


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  #113  
Old January 23rd 08, 09:31 PM posted to rec.bicycles.misc,alt.planning.urban,rec.bicycles.soc,rec.bicycles.rides,uk.rec.cycling
Tadej Brezina
external usenet poster
 
Posts: 187
Default If you don't believe in Evolution, then why do you drive an SUV?

Part of smart growth buildings these days in the USA is to include
showers, clothes washing services and chaning rooms in eco-smart

buildings
so bike riders can enter the business world in proper clothing. Europe

has
many fewer hot days than we do in the southern part of the USA.

Nice post Conk, nevertheless wrong location of the thread.
Yes you are probably true regarding moist and heat in the south. But
please do not compare apples and pears. Europe is not of singular
dimension, it has quite a respectable N-S extension and has very hot
places in the south too.
So compare e.g. New Orleans to Napoli or Boston to Hamburg.


New York is really opposite Madrid on the maps.


I was thinking more climate-wise, not latitude-wise.
T.
--
Frauen sind als Gesprächspartner nun einmal interessanter,
weil das Gespräch nicht beendet ist, wenn nichts sinnvolles mehr zu
sagen ist.
David Kastrup in d.t.r
 




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