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Calcium magnesium acetate (CMA, with chemical formula C 12 H 18 CaMg 2 O 12 [1]) is a deicer and can be used as an alternative to road salt.It is approximately as corrosive as normal tap water, and in varying concentrations can be effective in stopping road ice from forming down to around −27.5 °C (−17.5 °F) (its eutectic temperature [2]).
A metric ounce is an approximation of the imperial ounce, US dry ounce, or US fluid ounce. These three customary units vary. However, the metric ounce is usually taken as 25 or 30 ml (0.88 or 1.06 imp fl oz; 0.85 or 1.01 US fl oz) when volume is being measured, or in grams when mass is being measured.
The United States Army Chemical Materials Activity (CMA) is a separate reporting activity of the United States Army Materiel Command (AMC). Its role is to enhance national security by securely storing the remaining U.S. chemical warfare materiel stockpiles, while protecting the work force, the public and the environment to the maximum extent.
English-speaking countries also used a system of units of fluid measure, or in modern terminology volume units, based on the apothecaries' system. Originally, the terms and symbols used to describe the volume measurements of liquids were the same as or similar to those used to describe weight measurements of solids [33] (for example, the pound by weight and the fluid pint were both referred to ...
Technology readiness levels were conceived at NASA in 1974 and formally defined in 1989. The original definition included seven levels, but in the 1990s NASA adopted the nine-level scale that subsequently gained widespread acceptance. [14] Original NASA TRL Definitions (1989) [15] Level 1 – Basic Principles Observed and Reported
A trail difficulty rating system, also known as walking track grading system, walk gradings or trail grades, is a classification system for trails or walking paths based on their relative technical and physical difficulty. [1] A trail difficulty rating system informs visitors about the attributes of walking tracks and helps visitors ...
This second variation is commonly seen in a double-thimble or "hourglass" form, with two metal cups of different volumes (often in a 3:2 or 2:1 ratio, like a U.S. standard 1.5 fl oz "jigger" and 1 fl oz "pony", or UK standard 25/50mL or 35/70mL combos) spot-welded to each other at their relative bottom surfaces, possibly with a handle between ...
The Country Music Association Awards, also known as the CMA Awards or CMAs, are presented to country music artists and broadcasters to recognize outstanding achievement in the country music industry. [ 1 ] [ 2 ] The televised annual presentation ceremony features performances and award presentations by popular country music artists, with ...