w/w- an abbreviation for by weight, used in chemistry and pharmacology to describe the concentration of a substance in a mixture or solution. Properly speaking, 2% w/w means that the mass of the substance is 2% of the total mass of the solution or mixture. The metric symbol g/g has the same meaning as w/w.
Midlothian's old motto. Midlothian is a city in northwest Ellis County, Texas, United States. The city is 5 miles (8.0 km) southwest of Dallas. It is the hub for the cement industry in North Texas as it is the home to three separate cement production facilities, as well as a steel mill.
Community Information. Princeton is one of the rapid growing cities in Collin County, Texas. Princeton is located in Northeast Collin County between the cities of McKinney and Greenville Texas on U.S. Highway 380. At this time, Collin County is the fastest growing county in Texas.