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A proof mass or test mass is a known quantity of mass used in a measuring instrument as a reference for the measurement of an unknown quantity. [1]A mass used to calibrate a weighing scale is sometimes called a calibration mass or calibration weight.
The Gibson J-200 (formerly the Gibson SJ-200 or Super Jumbo 200), is an acoustic guitar model produced by the Gibson Guitar Corporation. Standard models of the guitar feature a uniquely shaped "moustache" bridge and a large pickguard with a vine-and-flowers decoration.
Calibration is critical. A lab scale, which usually is in an isolated chamber pressurized with dry nitrogen (pressurized at sea level) can weigh an object within plus or minus 100th of a gram, but ambient air pressure is a factor.
The steel-string acoustic guitar typically has a scale slightly shorter than the classical instrument, the most common scales ranging between short scale (24 inches (610 mm)) and long scale (25.5 inches (650 mm)). Small travel guitars and guitars specifically designed for children can have even shorter scales.
Terz guitar (Terz meaning third) refers to either a small sized classical guitar or to the practice of tuning a standard guitar a minor third higher than standard guitar tuning (as though a capo were on the third fret of the guitar). The scale length is generally 530 mm (20.8 inches), though sometimes as long as 560 mm (22 inches).
Such scales are used to make the most accurate of fine measurements, such as in the needs of empirical chemistry. Avoirdupois ( / ˌ æ v ər d ə ˈ p ɔɪ z , ˌ æ v w ɑːr dj uː ˈ p w ɑː / ; [ 1 ] abbreviated avdp. ) [ 2 ] is a measurement system of weights that uses pounds and ounces as units.
The 1960 Gibson catalog listed the (round shouldered) Southern Jumbo at $165.00 (without case), as compared to the "SJN Country Western" at $179.50, [3] with the less deluxe J-50 and J-45 priced at $145.00 and $135.00, respectively; [4] at the same time, the most expensive flat-top guitar in the Gibson line, the J-200N (J-200 in natural finish ...
Balance scale set, with weights Scales used to measure the weight of fruit in a supermarket Weighing scale in use in Tokyo Digital kitchen scale, a strain gauge scale Weighing scale for a baby includes a ruler for height measurement. A scale or balance is a device used to measure weight or mass.