Fighting Obesity Tip: Know your waist size is one of the more important ways to measure your health

<i>Dr. John:</i> Corn-syrup hazards, Nutcracker Syndrome, healthy-weight range | 9news.com: "BMI has certain limitations that can limit how accurate it is. It can overestimate body fat in those with muscular builds and underestimate body fat in older persons or those that have lost some muscle mass. A new measurement known as the BAI, Body Adiposity Index, is proving to be more accurate but is also a little more difficult to use. This method not only uses your height and weight but also adds your waist measurement into the equation to give you your overall body fat. And since we know your waist size is one of the more important ways to measure your health, this method seems to give a better idea of where you stand. To measure your own BAI you can go to http://www.intmath.com/functions-and-graphs/bmi-bai-comparison.php."

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UK: Solar subsidy changes could deal 'fatal blow' to industry

BBC News - Solar subsidy changes could deal 'fatal blow' to industry: "Government plans include restricting access to solar subsidies to houses meeting energy efficiency standards. Thousands of solar industry jobs could be at risk, the committees warn. On Thursday, a group of companies and environmental groups won a legal judgement against one of the changes. Central to their campaign was the Department of Energy and Climate Change's (Decc) plan to halve abruptly the level of feed-in tariff (FiT) that small-scale solar installations attract, from 43p per kilowatt-hour (kWh) to 21p."

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Hydroelectric Dam: The height of the water behind the dam is the relevant height for the potential energy calculation

How Much Dam Energy Can We Get? By Tom Murphy: "Hydroelectric dams exploit storage of gravitational potential energy. A mass, m, raised a height, h against gravity, g = 10 m/s², is given a potential energy E = mgh. The result will be in Joules if the input is expressed in meters, kilograms, and seconds (MKS, or SI units). Water has a density of ρ = 1000 kg/m³, so if we know how many cubic meters of water flow through the dam each second (F), the power available to the dam will be P = ηρFgh. We have inserted η to represent the efficiency of the dam—usually around 90% (η≈0.90)."

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