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In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.
To make 50% alcohol by volume fraction, one would take 50 parts alcohol and 50 parts water, measured separately, and then mix them together. The resulting volume will not be 100 parts but between 96 and 97 parts, since the smaller water molecules can take up some of the space between the larger alcohol molecules (see volume change ).
Graph of number of coupons, n vs the expected number of trials (i.e., time) needed to collect them all, E (T ) In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests.
Download QR code; Wikidata item; Print/export ... (born July 6, 1975), [3] known professionally as 50 Cent, [n 1] is an American rapper ... when it was on and off the ...
Oklahoma (/ ˌ oʊ k l ə ˈ h oʊ m ə / ⓘ OHK-lə-HOH-mə; [6] Choctaw: Oklahumma, pronounced) [7] is a state in the South Central region of the United States. [8] It borders Texas to the south and west, Kansas to the north, Missouri to the northeast, Arkansas to the east, New Mexico to the west, and Colorado to the northwest.
SOURCE: Integrated Postsecondary Education Data System, Wright State University-Main Campus (2014, 2013, 2012, 2011, 2010).Read our methodology here.. HuffPost and The Chronicle examined 201 public D-I schools from 2010-2014.
The study of suicide methods aims to identify those commonly used, and the groups at risk of suicide; making methods less accessible may be useful in suicide prevention. [4] [3] [11] Limiting the availability of means such as pesticides and firearms is recommended by a World Health Report on suicide and its prevention.
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