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An unfolded A4 page will fit into a C4 envelope. Due to same width to height ratio, if an A4 page is folded in half so that it is A5 in size, it will fit into a C5 envelope (which will be the same size as a C4 envelope folded in half). Any Cn paper can be defined as Cn = S × L, where (measuring in metres)
It is primarily used for envelopes. The area of C series sheets is the geometric mean of the areas of the A and B series sheets of the same number; for instance, the area of a C4 sheet is the geometric mean of the areas of an A4 sheet and a B4 sheet. This means that C4 is slightly larger than A4, and slightly smaller than B4.
Scientific pitch notation is often used to specify the range of an instrument. It provides an unambiguous means of identifying a note in terms of textual notation rather than frequency, while at the same time avoiding the transposition conventions that are used in writing the music for instruments such as the clarinet and guitar.
This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440).
The purpose behind 7.a4 is threefold: it prepares Bc1–a3, taking advantage of the absence of Black's dark-square bishop. It also prevents Black from playing ...Qa5–a4 or ...Bd7–a4 attacking c2, and if Black plays ...b6 (followed by ...Ba6 to trade off the bad bishop), White may play a5 to attack the b6-pawn.
The Wing Gambit can also be played against the French defense, although this is largely refuted at a grandmaster level.One line, as popularised by Gotham Chess [2], goes 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4, and black often takes cxb4 followed by a3 with a further gambit of a pawn in exchange for quick development of the minor pieces, and/or d4 and c3 to solidify the center.
From smoky Texas brisket to saucy Kansas City ribs to tangy Carolina pulled pork, there’s a whole nation of amazing barbecue out there. Knowing each state and region’s signature BBQ styles ...
In chess, the Smith–Morra Gambit (or simply Morra Gambit) is an opening gambit against the Sicilian Defence distinguished by the moves: . 1. e4 c5 2. d4 cxd4 3. c3. White sacrifices a pawn to develop quickly and create attacking chances.