Recent content by Steve Aplin

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    Can planting trees really reduce CO2 in atmosphere?

    @Bystander: in the sense of warding off climate change due to anthropogenic CO2. Whatever amounts that trees do absorb, we are exceeding that amount with fossil fuel emissions. Every tree will eventually turn into CO2 anyway, just due to saprotrophic fungi. But trees cannot grow without...
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    Can planting trees really reduce CO2 in atmosphere?

    From mycology books and articles, I read that most land plants (> 80 percent) on Earth live in symbiosis with mycorrhizal fungi. In this symbiosis, plants provide glucose to fungi and fungi provide water and nutrients to the plants. Without fungi, plants cannot harvest nutrients in sufficient...
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    Power output of automobile at different engine rpm

    DEvens, thanks -- I guess I'm trying to figure out only gross power output from the gasoline... sounds from your reply that there is some feedback relationship between fuel consumption and the force going into the powertrain. Going up the steep hill at 3,500 rpm, would there be more fuel...
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    Power output of automobile at different engine rpm

    I figure my 2.4 liter Volvo will burn about a liter of gasoline over an hour of idling (source: Natural Resources Canada). Since a liter of gasoline contains roughly 33.8 million joules (~9.4 kilowatt-hours) of energy, I figure that that means my car idles at a power output of around 9.4...
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    Hello Physics Forums, I'm excited to finally join

    I have often visited and read questions and answers, and really like the subject so figured I'd join and participate. Academically, I come from the Arts world (history). What really got me interested was a project I did a few years ago, which was a market study of radioisotopes. I am endlessly...
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