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The Mozambique Drill, [1] also known as the Failure Drill, Failure to Stop drill, or informally as "two to the body, one to the head", [2] [3] is a close-quarters shooting technique that requires the shooter to fire twice into the torso of a target (known as a double tap or hammered pair to the center of mass), and follow up with a more difficult shot to the head that, if properly placed ...
A double tap (named after the shooting technique where two shots are fired in rapid succession at the same target) is the practice of following a strike (be it bombardment such missile, air strikes, artillery shelling or detonation of explosive weapon or improvised explosive device) with a second strike several minutes later, hitting emergency responders and medical personnel rushing to the site.
An 8-plate 160 V 450 mA Federal brand selenium rectifier. A selenium rectifier is a type of metal rectifier, invented in 1933. [1] They were used in power supplies for electronic equipment and in high-current battery-charger applications until they were superseded by silicon diode rectifiers in the late 1960s.
The isotope selenium-75 has radiopharmaceutical uses. For example, it is used in high-dose-rate endorectal brachytherapy, as an alternative to iridium-192. [8]In paleobiogeochemistry, the ratio in amount of selenium-82 to selenium-76 (i.e, the value of δ 82/76 Se) can be used to track down the redox conditions on Earth during the Neoproterozoic era in order to gain a deeper understanding of ...
Following rearrangement and loss of water, a second equivalent of water attacks the alpha position. Red amorphous selenium is liberated in the final step to give the 1,2-dicarbonyl product. [8] [9]: 4331 Allylic oxidation using selenium-dioxide proceeds via an ene reaction at the electrophilic selenium center.
Selenium dioxide is the chemical compound with the formula SeO 2. This colorless solid is one of the most frequently encountered compounds of selenium . It is used in making specialized glasses as well as a reagent in organic chemistry.