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The states and territories included in the United States Census Bureau 's statistics for the United States population, ethnicity, and most other categories include the 50 states and Washington, D.C. Separate statistics are maintained for the five permanently inhabited territories of the United States: Puerto Rico, Guam, the U.S. Virgin Islands ...
Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process. The presence on an item of a recycling code, a chasing arrows logo, or a resin code , is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
This is a list of languages by total number of speakers. It is difficult to define what constitutes a language as opposed to a dialect . For example, Chinese and Arabic are sometimes considered single languages, but each includes several mutually unintelligible varieties , and so they are sometimes considered language families instead.
Twenty is a pronic number, as it is the product of consecutive integers, namely 4 and 5. [3] It is the third composite number to be the product of a squared prime and a prime (and also the second member of the 22 × q family in this form). It has an aliquot sum of 22; a semiprime, within an aliquot sequence of four composite numbers (20, 22, 14 ...
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 ...
This is a list of individuals serving in the United States House of Representatives (as of May 6, 2024, the 118th Congress). The membership of the House comprises 435 seats for representatives from the 50 states, apportioned by population, as well as six seats for non-voting delegates from U.S. territories and the District of Columbia.
The Rwandan genocide, also known as the genocide against the Tutsi, occurred between 7 April and 19 July 1994 during the Rwandan Civil War. [4] [5] During this period of around 100 days, members of the Tutsi minority ethnic group, as well as some moderate Hutu and Twa, were killed by armed Hutu militias.
John Jacob Astor saw his wife off to safety in No. 4 boat at 01:55 but was refused entry by Lightoller, even though 20 of the 60 seats aboard were unoccupied. [138] The last boat to be launched was collapsible D, which left at 02:05 with 25 people aboard; [140] two more men jumped on the boat as it was being lowered. [141]