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 Denby Langley ENERGY Lasagna white celadon 1195715  US $87.95
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Math / Science Math Help!?
1) There are a total of approximately 12.4 million hectares of agricultural land (land cultivation, grazing, irrigated land) in the major continents. Given that the average net primary productivity (NPP) of agricultural land is approximately 2,900 kcal m-2-1 and the calculation of annual global NPP associated with these lands (the answer should be reported in SI units, ie Joules) 2) Suppose that animals (Humans and pets) have a power conversion efficiency 10% and we need about 2800 kcal d-1 to survive. How many i) Human Vegetarians and ii) Human omnivores planet could currently support (for simplicity we assume that 50% of the energy content of the omnivorous diet comes from meat or meat). on the implications of this calculation. Comment UNITS YOU FOR USE: 1 hectare = 2.47 acres, 1 ton = 1017 kg (1,017 tons), mind (Langley) = 1 cal cm-2, 1 cal = 4.184 J
So pathetic to see the policy useless half-inserted into simple mathematical problems. Where does this problem? Work backwards to see the point of results. 2,800 kcal / day / 10% = 28 000 kcal / day consumption. if half comes from the flesh, then we must divide half again by 10%, 14000 kcal / day consumption of plants, 14000 kcal / day from meat. 140 000 kcal / day consumption of animals consumed, 154,000 kcal / day plant consumption by humans and the animals eat. 154,000 kcal / day per person is greater than 28,000 kcal / day, but both numbers are incredibly wrong. People can survive well in 2000 kcal / day. American women, on average, consume less than 1900 kcal / day. So why is the figure of Ten percent of the problem? The relationship, however, is reasonable. It takes about 5.5 x as many calories to support the omnivorous in this problem. Of course, vegetarian does not make use of grasses that can not support the point, and rarely makes use of algae or other feed for the fish. Most agricultural land is not suitable to produce foods that vegetarians. Also vegetarians are a real hole and the earth would be better without them. The first problem is a simple story. 12.4 billion of 5 million acres acres = 50000000000000 .= m2 1 kcal = 4184 J (1 cal = 4.184 J) 2900 MJ kcal = 12.134 12.134 x 10 ^ 6 * J/m2 50x10 ^ 12 m2 = 609 x 10 ^ 18 J
TNO College: will the internet make us go green? (speech)
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Denby Langley ENERGY Lasagna white celadon 1195715 US $87.95
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Denby Langley ENERGY LEAF 8 Individual Pasta Bowl US $87.95
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Denby Langley ENERGY Square Baking Dish 3975495 US $74.95
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Denby Langley ENERGY Chop Plate Round Platter 5784523 US $64.95
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Denby Langley ENERGY LEAF Beaker Mug 1924769 US $64.95
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Denby Langley ENERGY Mug celadon white 5561732 US $64.95
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