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2,2-Dichloro-1,1,1-trifluoroethane or HCFC-123 is considered as an alternative to CFC-11 in low pressure refrigeration and HVAC systems, and should not be used in foam blowing processes or solvent applications.
For example, consider Halon 1211. This halon has number 1211 in its name, which tells it has 1 carbon atom, 2 fluorine atoms, 1 chlorine atom, and 1 bromine atom. A single carbon only has four bonds, all of which are taken by the halogen atoms, so there is no hydrogen. Thus its formula is CF 2 ClBr, hence its IUPAC name is ...
Aztec women are handed flowers and smoking tubes before eating at a banquet, Florentine Codex, 16th century. Smoking's history dates back to as early as 5000–3000 BC, when the agricultural product began to be cultivated in Mesoamerica and South America; consumption later evolved into burning the plant substance either by accident or with intent of exploring other means of consumption. [1]
Half-Life is a first-person shooter that requires the player to perform combat tasks and puzzle solving to advance through the game. Unlike most first-person shooters at the time, which relied on cut-scene intermissions to detail their plotlines, Half-Life ' s story is told mostly using scripted sequences (bar one short cutscene), keeping the player in control of the first-person viewpoint.
The power pack can be changed in the field in 35 minutes. [60] The engine and transmission are separated from the crew compartment through a fireproof bulkhead. [81] An enhanced version of the EuroPowerPack, with a 1,650 PS (1.2 MW) MTU MT883 engine has been trialled by the Leopard 2. [81]
The Wii U (/ ˌ w iː ˈ j uː / WEE YOO) is a home video game console developed by Nintendo as the successor to the Wii. [6] Released in late 2012, [7] it is the first eighth-generation video game console [8] [9] and competed with Microsoft's Xbox One and Sony's PlayStation 4.
The average costs of construction accordingly increased, to $4.24 billion, [1] [17] [18] [2] well exceeding the per-unit cost of a nuclear-powered Virginia-class submarine ($2.688 billion), [19] [20] and with the program's large development costs now attributable to only three ships, rather than the 32 originally planned, the total program cost ...
T-55M1 Leon 1 (right) with Peruvian M113 APC (left-center) in action in 2008 T-55M8A2 TIFÓN-2. T-55 modernization which replaces the V-55 diesel engine with a Caterpillar diesel one. It was not accepted by the Peruvian Army. T-55M1 Leon 1 - T-55 modernization designed by the Peruvian