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Caesium-137 ( 137. 55Cs. ), cesium-137 (US), [7] or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons.
The Thirty Years' War [j] was one of the longest and most destructive conflicts in European history, lasting from 1618 to 1648. Fought primarily in Central Europe, an estimated 4.5 to 8 million soldiers and civilians died as a result of battle, famine, or disease, while parts of present-day Germany reported population declines of over 50%. [19]
A gamma ray, also known as gamma radiation (symbol. γ. ), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays. With frequencies above 30 exahertz ( 3 × 1019 Hz) and wavelengths less than 10 ...
These account for about 30% of gamma-ray bursts, but until 2005, no afterglow had been successfully detected from any short event and little was known about their origins. Since then, several dozen short gamma-ray burst afterglows have been detected and localized, several of which are associated with regions of little or no star formation, such ...
A Smoking Advertisement Unit was set up by the Ministry, and officers were located in areas that had any type of tobacco advertisement within the few months before the blanket ban on tobacco advertising kicked off on 1 March 1971. Twenty-one years later, in 1992, cigarette advertising in foreign magazines was banned in Singapore.
Until 30 September 2007, the minimum age to purchase and consume tobacco products in public was 16 years of age. From 30 September 2007, the Tobacco and Primary Medical Services (Scotland) Act 2010 became effective, raising the minimum purchase, consumption, and possession age to 18 years of age. Section 4: Sale of tobacco products to persons ...