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Brannock Device: measuring shoe size breathalyzer: breath alcohol content caliper: length calorimeter: heat of chemical reactions cathetometer: vertical distances ceilometer: height of a cloud base chronometer or clock: time clap-o-meter: volume of applause compass: direction of North Coulombmeter: electrostatic charge of a material colorimeter ...
In addition these devices can remain on the specimen until failure and measure very high extensions (up to 1000 mm) without losing any accuracy. These devices typically have resolutions of 0.3 μm or better (the highest quality devices can read values as low as 0.02 μm) and have sufficient measurement accuracy to meet class 1 and 0.5 of ISO 9513.
Length measurement, distance measurement, or range measurement (ranging) all refer to the many ways in which length, distance, or range can be measured. The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the speed of light .
The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 metres ( 1 / 1 000 m = 0.001 m). To help compare different orders of magnitude , this section lists lengths between 10 −3 m and 10 −2 m (1 mm and 1 cm).
The fermi is a unit of distance used in nuclear physics equal to 1 fm. [9] The angstrom (symbol Å) is a unit of distance used in chemistry and atomic physics equal to 100 pm. The micron (μ) is a unit of distance equal to one micrometre (1 μm). The basic module (M) is a unit of distance equal to one hundred millimetres (100 mm).
The conversion between different SI units for one and the same physical quantity is always through a power of ten. This is why the SI (and metric systems more generally) are called decimal systems of measurement units. [10] The grouping formed by a prefix symbol attached to a unit symbol (e.g. ' km ', ' cm ') constitutes a new inseparable unit ...
length "The metre, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s −1, where the second is defined in terms of ∆ν Cs." [1]
This device's capabilities include the measurement of the CO 2 exchange of the leaves, CO 2 concentration in the air, photosynthetically active radiation, Air vapor deficit, etc. [43] The package for the device includes PTM-48A SYSTEM CONSOLE, LC-4B LEAF CHAMBER (4 pcs.), RTH-48 METER, 12 VDC POWER ADAPTER, HOLDER FOR LEAF CHAMBER (4 pcs.), 4-m ...