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Minecraft is a 2011 sandbox game developed and published by Swedish video game developer Mojang Studios. Originally created by Markus "Notch" Persson using the Java programming language, the first public alpha build was released on 17 May 2009. The game was continuously developed from then on, receiving a full release on 18 November 2011.
A mattock (/ ˈ m æ t ə k /) is a hand tool used for digging, prying, and chopping. Similar to the pickaxe, it has a long handle and a stout head which combines either a vertical axe blade with a horizontal adze (cutter mattock), or a pick and an adze (pick mattock).
Pickaxes are commonly carried by Pioneer Sergeants in the British Army. [5] A normal pickaxe handle is made of ash or hickory wood and is about 3 ft (91 cm) and weighs about 2.5 lb (1.1 kg). British Army pickaxe handles must, by regulation, be exactly 3 ft (91 cm) long, for use in measuring in the field. [citation needed] New variant designs are:
Tetraethyllead (commonly styled tetraethyl lead), abbreviated TEL, is an organolead compound with the formula Pb(C 2 H 5) 4.It was widely used as a fuel additive for much of the 20th century, first being mixed with gasoline beginning in the 1920s.
The most common use of PETN is as an explosive with high brisance. It is a secondary explosive , meaning it is more difficult to detonate than primary explosives , so dropping or igniting it will typically not cause an explosion (at standard atmospheric pressure it is difficult to ignite and burns vigorously), but is more sensitive to shock and ...
Steve is a player character from the 2011 sandbox video game Minecraft.Created by Swedish video game developer Markus "Notch" Persson and introduced in the original 2009 Java-based version, Steve is the first and the original default skin available for players of contemporary versions of Minecraft.
To provide confidentiality the TETRA air interface is encrypted using one of the TETRA Encryption Algorithm (TEA) ciphers. The encryption provides confidentiality (protect against eavesdropping) as well as protection of signalling. Currently 7 different ciphers are standardized: TEA1 to TEA4 in TEA Set A and TEA5 to TEA7 in TEA Set B.
Pentaerythritol was first reported in 1891 by German chemist Bernhard Tollens and his student P. Wigand. [5] It may be prepared via a base-catalyzed multiple-addition reaction between acetaldehyde and 3 equivalents of formaldehyde to give pentaerythrose (CAS: 3818-32-4), followed by a Cannizzaro reaction with a fourth equivalent of formaldehyde to give the final product plus formate ion.