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Social media. Social media are interactive technologies that facilitate the creation, sharing and aggregation of content, ideas, interests, and other forms of expression through virtual communities and networks. [1] [2] Common features include: [2] Online platforms that enable users to create and share content and participate in social networking.
In the 2011–2012 academic year, students qualifying for Pell Grants (federally funded scholarships on the basis of need) constituted 20% at Harvard, 18% at Cornell, 17% at Penn, 16% at Columbia, 15% at Dartmouth and Brown, 14% at Yale, and 12% at Princeton. Nationally, 35% of American university students qualify for a Pell Grant.
Hydrogen peroxide ( H2O2) is a nonplanar molecule with (twisted) C 2 symmetry; this was first shown by Paul-Antoine Giguère in 1950 using infrared spectroscopy. [9] [10] Although the O−O bond is a single bond, the molecule has a relatively high rotational barrier of 386 cm −1 (4.62 kJ / mol) for rotation between enantiomers via the trans ...
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