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Refractometry is the analytical method of measuring substances' refractive index (one of their fundamental physical properties) in order to, for instance, assess their composition or purity. A refractometer is the instrument used to measure refractive index ("RI"). Although refractometers are best known for measuring liquids, they are also used ...
Due to the microprocessor control and a number of interfaces, automatic refractometers are able to communicate with computers or other measuring devices, e.g. density meters, pH meters or viscosity meters, to store refractive index data and density data (and other parameters) into one database.
Ronald Reagan Minuteman Missile State Historic Site - State Historical Society of North Dakota Historic American Engineering Record documentation filed under Cooperstown, Griggs County, ND: HAER No. ND-12, " Grand Forks Air Force Base, Missile Alert Facility Oscar-Zero ", 13 photos, 45 data pages, 3 photo caption pages
The underground LCC Launch Control Center (LCC) contains the command and control equipment for missile operations. It is staffed by the two launch officers who have primary control and responsibility for the 10 underground and hardened Launch Facilities (LF)s within its flight which contains the operational missile.
North Dakota 20 in Devils Lake, August 2013. Starting at US 52 in downtown Jamestown, ND 20 follows 4th Street NE until 5th Avenue NE, then curves onto 13th Street NE until 12th Avenue NE where ND 20 follows 12th Avenue out of Jamestown. 21.3 miles away from the intersection, ND 20 turns right onto ND 9 and continues for about six miles before turning off in Courtenay and running for 16.8 ...
The Stanley R. Mickelsen Safeguard Complex (SRMSC) was a cluster of military facilities near Nekoma, North Dakota, that supported the United States Army's Safeguard anti-ballistic missile program. [1] The complex provided launch and control for 30 LIM-49 Spartan anti-ballistic missiles, and 70 shorter-range Sprint anti-ballistic missiles.
When solutes are added to a solvent, they change the solution's optical density. The size, [20] polarizability [19] and shape and molecular structure [20] of a solute all have effects on the refractive index of a solution. Generally, a Gaussian distribution is observed, although deviations occur. [20]
The Sarles–Crystal City Border Crossing connects the towns of Sarles, North Dakota and Crystal City, Manitoba on the Canada–United States border. North Dakota Highway 20 on the American side joins Manitoba Highway 34 on the Canadian side.