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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 ...
Interstellar is a 2014 epic science fiction drama film directed, written, and produced by Christopher Nolan and starring Matthew McConaughey, Anne Hathaway, Jessica Chastain, Bill Irwin, Ellen Burstyn, Michael Caine, and Matt Damon. Set in a dystopian future where humanity is embroiled in a catastrophic blight and famine, the film follows a ...
1,490–1,635. RMS Titanic sank on 15 April 1912 in the North Atlantic Ocean. The largest ocean liner in service at the time, Titanic was four days into her maiden voyage from Southampton to New York City, with an estimated 2,224 people on board when she struck an iceberg at 23:40 ( ship's time) [a] on 14 April.
Fusing four free protons (hydrogen nuclei) into a single alpha particle (helium nucleus) releases around 0.7% of the fused mass as energy, so the Sun releases energy at the mass–energy conversion rate of 4.26 billion kg/s (which requires 600 billion kg of hydrogen), for 384.6 yottawatts (3.846 × 10 26 W), or 9.192 × 10 10 megatons of TNT ...
Sustainability is a social goal for people to co-exist on Earth over a long time. Definitions of this term are disputed and have varied with literature, context, and time. [2] [1] Sustainability usually has three dimensions (or pillars): environmental, economic, and social. [1]
The 2020 United States presidential election was the 59th quadrennial presidential election, held on Tuesday, November 3, 2020. The Democratic ticket of former vice president Joe Biden and the junior U.S. senator from California Kamala Harris defeated the incumbent Republican president, Donald Trump, and vice president, Mike Pence.
t. e. Generation Z (often shortened to Gen Z ), colloquially known as Zoomers, [1] [2] [3] is the demographic cohort succeeding Millennials and preceding Generation Alpha. Researchers and popular media use the mid-to-late 1990s as starting birth years and the early 2010s as ending birth years.
The History of Yuan, vol 121 (1370) Retreating southeast to Baljuna, an unidentified lake or river, Temüjin waited for his scattered forces to regroup: Bo'orchu had lost his horse and was forced to flee on foot, while Temüjin's badly wounded son Ögedei had been transported and tended to by Borokhula, a leading warrior. Temüjin called in every possible ally and swore a famous oath of ...
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