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Usage of the term "Greek fire" has been general in English and most other languages since the Crusades. Original Byzantine sources called the substance a variety of names, such as "sea fire" (Medieval Greek: πῦρ θαλάσσιον pŷr thalássion), "Roman fire" (πῦρ ῥωμαϊκόν pŷr rhōmaïkón), "war fire" (πολεμικὸν πῦρ polemikòn pŷr), "liquid fire ...
He is credited with the invention of Greek fire, the premodern precedent of the flamethrower. According to Constantine Porphyrogenitus, he arrived in Byzantium in the time of Constantine IV and shared his knowledge of liquid fire with the Byzantines. [9] [10] Callinicus’ exact formula was a carefully guarded secret, and remains unknown today ...
1,1,1,3,3,3-Hexafluoropropane is an organic chemical, an organofluoride.It is a colorless gas, usually available in the form of a liquid gas. [citation needed] It is used as a fire suppression agent, a foaming agent, a highly effective refrigerant, a heat transfer medium, a dielectric gas, a sterilant carrier, a polymerization medium, a carrier fluid, a displacement drying agent, a ...
[1] Fire was one of many archai proposed by the pre-Socratics, most of whom sought to reduce the cosmos, or its creation, to a single substance. Heraclitus (c. 535 BCE – c. 475 BCE) considered fire to be the most fundamental of all elements. He believed fire gave rise to the other three elements: "All things are an interchange for fire, and ...
A man was convicted of involuntary arson on Monday for his role in Greece's deadliest wildfire in memory, and five former fire officials found guilty of misdemeanours linked to their response to ...
Every red circle passes through the two foci, which correspond to points A and B in Figure 1. The circles defined by the Apollonian pursuit problem for the same two points A and B , but with varying ratios of the two speeds, are disjoint from each other and form a continuous family that cover the entire plane; this family of circles is known as ...
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3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.