The problem: Answer a question about this article:
Some types of energy are a varying mix of both potential and kinetic energy. An example is mechanical energy which is the sum of (usually macroscopic) kinetic and potential energy in a system. Elastic energy in materials is also dependent upon electrical potential energy (among atoms and molecules), as is chemical energy, which is stored and released from a reservoir of electrical potential energy between electrons, and the molecules or atomic nuclei that attract them.[need quotation to verify].The list is also not necessarily complete. Whenever physical scientists discover that a certain phenomenon appears to violate the law of energy conservation, new forms are typically added that account for the discrepancy.
What is dependent upon electrical potential energy?
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The answer: Elastic energy in materials


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The sensors are primarily single cells that detect light, chemicals, pressure waves and contact, and are present on the head, appendages (if any) and other parts of the body. Nuchal ("on the neck") organs are paired, ciliated structures found only in polychaetes, and are thought to be chemosensors. Some polychaetes also have various combinations of ocelli ("little eyes") that detect the direction from which light is coming and camera eyes or compound eyes that can probably form images. The compound eyes probably evolved independently of arthropods' eyes. Some tube-worms use ocelli widely spread over their bodies to detect the shadows of fish, so that they can quickly withdraw into their tubes. Some burrowing and tube-dwelling polychaetes have statocysts (tilt and balance sensors) that tell them which way is down. A few polychaete genera have on the undersides of their heads palps that are used both in feeding and as "feelers", and some of these also have antennae that are structurally similar but probably are used mainly as "feelers".
What type of annelids have nuchal organs?
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The answer: polychaetes


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In 2005, Beyoncé teamed up with House of Brands, a shoe company, to produce a range of footwear for House of Deréon. In January 2008, Starwave Mobile launched Beyoncé Fashion Diva, a "high-style" mobile game with a social networking component, featuring the House of Deréon collection. In July 2009, Beyoncé and her mother launched a new junior apparel label, Sasha Fierce for Deréon, for back-to-school selling. The collection included sportswear, outerwear, handbags, footwear, eyewear, lingerie and jewelry. It was available at department stores including Macy's and Dillard's, and specialty stores Jimmy Jazz and Against All Odds. On May 27, 2010, Beyoncé teamed up with clothing store C&A to launch Deréon by Beyoncé at their stores in Brazil. The collection included tailored blazers with padded shoulders, little black dresses, embroidered tops and shirts and bandage dresses.
What was the name of the junior fashions launched in 2009 by Beyoncé and her mother?
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The answer: Sasha Fierce for Deréon


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Unfortunately, requiring two characters to mark the end of a line introduces unnecessary complexity and questions as to how to interpret each character when encountered alone. To simplify matters plain text data streams, including files, on Multics used line feed (LF) alone as a line terminator. Unix and Unix-like systems, and Amiga systems, adopted this convention from Multics. The original Macintosh OS, Apple DOS, and ProDOS, on the other hand, used carriage return (CR) alone as a line terminator; however, since Apple replaced these operating systems with the Unix-based OS X operating system, they now use line feed (LF) as well.
Why is adding two characters at the ned of a line problemsome? 
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The answer:
introduces unnecessary complexity and questions as to how to interpret each character when encountered alone