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11-Aug-2017 20:59

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Alternative energy enthusiasts could sing the praises of battery banks and the renewable energy set-ups that accompany them until the cows come home, but it is cold, hard statistics that provide the delicious pudding of proof for those who wonder what the future holds for the off-the-grid energy economy.Following a 60 percent decline in the price of solar panels from 2011 to 2012, the interest of US consumers in this energy technology picked up dramatically, and in 2012 alone there was a 76 percent jump in the amount of electricity provided to US homes by residential solar arrays.

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Since then, I wanted to try this lipstick, and I finally bought a shade called Soft Mauve.

Their expense notwithstanding, sealed lead-acid batteries are still appropriate for use in weekend cabins or in homes that are occupied seasonally, where a small solar array/large battery bank combination can provide all the energy that will be needed without battery functioning being compromised by chronic over- or undercharging.

Virtual Dating contains two options as well as a demonstration version. Virtual Dating Isochron for rocks and minerals; Virtual Dating Radiocarbon Carbon-14; Virtual Dating Demo If you just want to do a quick run-through of the activity, try the "Demo" version-- answer checking and other feedbacks are not implemented.… continue reading »

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INTRODUCTION TO PHYSICAL GEOLOGY. 1.5 lab exerCIse. Part b – faunal succession. The use of animals and their preserved remains fossils can help build a high- ly precise time sequence, often with a higher resolution than absolute dating. In the following section, use this principle to answer the following questions.… continue reading »

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Sep 30, 2014. Geologic age dating is an entire discipline of its own. In a way, this field, called geochronology, is some of the purest detective work earth scientists do. There are two basic approaches relative geologic age dating, and absolute geologic age dating.… continue reading »

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Relative Age vs. Absolute Age. • There are two ways of dating geological materials. – Relative ages – Based upon order of formation. • Qualitative method developed 100s of years ago. • Permit determination of older vs. younger relationships. – Numerical ages – Actual number of years since an event. • Quantitative method.… continue reading »

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Carbon dating is based upon the decay of 14C, a radioactive isotope of carbon with a relatively long half-life 5700 years. While 12C is the most abundant carbon isotope, there is a close to constant ratio of 12C to 14C in the environment, and hence in the molecules, cells, and tissues of living organisms. This constant ratio.… continue reading »

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