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Crystal structure morphology as a function of temperature and water saturation Temperature range Saturation range (g/m 3) Types of snow crystal below saturation Types of snow crystal above saturation 0 °C (32 °F) to −3.5 °C (26 °F) 0.0 to 0.5 Solid plates Thin plates Dendrites −3.5 °C (26 °F) to −10 °C (14 °F) 0.5 to 1.2
Snow accumulation on ground and in tree branches in Germany Snow blowing across a highway in Canada Spring snow on a mountain in France. Classifications of snow describe and categorize the attributes of snow-generating weather events, including the individual crystals both in the air and on the ground, and the deposited snow pack as it changes over time.
Carbon monoxide (chemical formula CO) is a poisonous, flammable gas that is colorless, odorless, tasteless, and slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the simplest carbon oxide. In coordination complexes, the carbon monoxide ligand is called carbonyl. It is ...
It also has a more extensive classification of deposited snow than those that pertain to airborne snow. The categories include both natural and man-made snow types, descriptions of snow crystals as they metamorphose and melt, the development of hoar frost in the snow pack and the formation of ice therein.
From 1933, Nakaya observed natural snow and created 3,000 photographic plates of snow crystals, classifying them into seven major and numerous minor types. [2] In the course of these observations, taking photographs of natural snow and sorting them by appearance according to weather conditions, Nakaya felt the need to make artificial snow from ice crystals grown in the laboratory.
Gas appliances are designed to vent CO outdoors, but if there’s a malfunction, they can leak it indoors and cause carbon monoxide poisoning. Breathing in a lot of CO can make you pass out, or ...
Snow sliders – The ability of a ski or other runner to slide over snow depends on both the properties of the snow and the ski to result in an optimum amount of lubrication from melting the snow by friction with the ski—too little and the ski interacts with solid snow crystals, too much and capillary attraction of meltwater retards the ski.
Diphenyl oxalate is obtained by transesterification with phenol in the presence of titanium catalysts, [14] which is again decarbonylated to diphenyl carbonate in the liquid or gas phase. Dimethyl oxalate can also be used as a methylating agent. It is notably less toxic than other methylating agents such as methyl iodide or dimethyl sulfate. [15]