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In the Latin-based orthographies of many European languages, including English, a distinction between hard and soft c occurs in which c represents two distinct phonemes. The sound of a hard c often precedes the non-front vowels a , o and u , and is that of the voiceless velar stop , /k/ (as in car ).
HSAB is an acronym for "hard and soft (Lewis) acids and bases".HSAB is widely used in chemistry for explaining the stability of compounds, reaction mechanisms and pathways. It assigns the terms 'hard' or 'soft', and 'acid' or 'base' to chemical species.
5 List of English words where C is pronounced exceptionally. 3 comments. 6 C and ch, c and k, c and qu. 4 comments. 7 Exception to the rule. ... 10 The terms "hard ...
Hard carbon is a low density material, with extremely high microporosity, while soft carbon has little microporosity. Hard carbon is extensively used as anode materials in lithium-ion batteries [4] and sodium-ion batteries. [5] [6] Manufacturers of hard carbon include Xiamen Tob New Energy (China), Kuraray (Japan) and Stora Enso (Finland).
In English orthography, c generally represents the "soft" value of / s / before the letters e (including the Latin-derived digraphs ae and oe , or the corresponding ligatures æ and œ ), i , and y , and a "hard" value of / k / before any other letters or at the end of a word.
While c , which also has hard and soft pronunciations, exists alongside k (which always indicates a hard pronunciation), g has no analogous letter or letter combination which consistently indicates a hard g sound, even though English uses j consistently for the soft g sound (the rationale for the spelling change of "gaol" to "jail").
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Hard science and soft science are colloquial terms used to compare scientific fields on the basis of perceived methodological rigor, exactitude, and objectivity. [ 1 ] [ 2 ] [ 3 ] In general, the formal sciences and natural sciences are considered hard science , whereas the social sciences and other sciences are described as soft science .