At room temperature, ammonia (NH3) is a highly water-soluble, colorless, irritant gas with a unique pungent odor. Ammonia has a boiling point of -33Â°C and an ignition temperature of 650Â°C. Injury from ammonia most commonly is caused by inhalation, but it also may follow ingestion or direct contact with eyes or skin.
Guitar frets are thin strips of metal that are embedded in the neck of the guitar. They are raised up from the face of the fretboard in order to separate the neck into different semi-tonal intervals. This basically means that each fret indicates a different note. Frets are numbered just like the strings are. They are not, however, numbered by the metal pieces themselves but by the space in between the metal pieces. For instance, the first fret on the guitar is the space between the nut and the first metal piece. The fret wire is commonly made of a nickel/silver alloy, but stainless steel wire, although more expensive, produces longer lasting benefits.
Guitar Neck Fretboard Radius. Fretboards are curved across their width to accommodate the natural shape of fingers in playing position. Some are curved a great deal, while others feel almost flat. The amount of a fretboard's curvature is referred to as its radius. Fretboards with a small radius are more curved, while those with a large radius are more flat. The measurement is arrived at by extending the arc of the fretboard to form an imaginary circle around the neck. The radius of this circle is the fretboard's radius.