Rotl, rotel, rottle, ratel, or arratel a traditional Arab unit of weight corresponding to the Roman libra, the French livre, and the English pound. Richter scale a logarithmic scale measuring earthquake intensity. Yarn is described as n run if there are n 1600-yard hanks of the wool per pound. Run a unit of density for woolen yarn, used in the.S. Before x ray machines were invented, broken bones, tumors and the location of bullets were all diagnosed by physical examination and a doctor's best guess. However, it came to be used instead as the reciprocal of the poise itself, so the fluidity of a substance in rhes is 1 divided by its dynamic viscosity in poise. Rhe a unit of fluidity, the opposite of viscosity. Rad (rd) a metric unit measuring radiation dose. Round the basic unit of time in boxing, equal to 3 minutes.

This unit represents the total area of a ream (1) of 500 full-size sheets of paper, each sheet being 3 feet by 2 feet. While a plant or animal is alive, the fraction of radioactive carbon in its body remains equal to the fraction in the atmosphere at that time. Roentgen, rntgen noun, wilhelm Konrad (vlhlm knrat). (Working backwards, this changes the definition of a quire from 24 to 25 sheets.) The new definition reflects the current practice of marketing many kinds of paper in packages of 500 sheets. The Wright brothers began building prototypes and eventually traveled to Kitty Hawk, North Carolina, in 1902 to test a full-size, two-winged glider with a moveable rudder. The reading is the time, in seconds, for 50 milliliters of a sample of a liquid to flow through the device. Rockwell hardness (RH-) a measure of the hardness of a metal introduced by Rockwell in 1922. Rice cup a common name in English for the Japanese go, a unit of dry and liquid capacity equal to about 180 milliliters or 3/4 of.S.