Specific activity Specific activity Specific activity is the activity per quantity of a radionuclide and is a physical property of that radionuclide. Activity is a quantity related to radioactivity. The SI unit of activity is the becquerel (Bq), equal to one reciprocal second. The becquerel is defined as the number of radioactive transformations per second that occur in a particular radioactive isotope. Its related non-SI unit equivalent is the Curie (Ci) which is transformations per second. Since the probability of radioactive decay for a given radionuclide is a fixed physical quantity (with some slight exceptions, see changing decay rates), the number of
Si Pitung Si Pitung Si Pitung (Old spelling: Si Pitoeng; or sometimes written just Pitung) was a 19th-century bandit in Batavia, Dutch East Indies (modern-day Jakarta, Indonesia). His exploits have since become legendary, with numerous accounts of his life, deeds, and death. Pitung was born in Pengumben, a slum in Rawabelong (near modern-day Palmerah Station) to Bung Piung and Mbak Pinah; he was the fourth son born to the couple. His real name was Salihoen. Based on oral tradition, the name Pitung is derived from "pituan pitulung" (Javanese for "group of seven"). As a child, Salihoen studied at Hadji Naipin's Islamic boarding