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.
A guitarâs (or any fretted instrumentâs) scale length is the basic distance between the nut or zero fret and the bridgeâs saddle. This measurement not only determines the placement of the frets for proper intonation, but has a profound effect on string tension, tone, and in some cases, tuning stability. full-scale classical guitar has a scale length of about 650 mm, but this is not comfortable for some players, so scales ranging down to 630 mm also available. Many beginners and people without large hands use these guitars, and thereâs no reason not to, if it makes playing more enjoyable.