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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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#112
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If you don't believe in Evolution, then why do you drive an SUV?
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#113
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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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