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2. Radiation - Wikipedia

   en.wikipedia.org/wiki/Radiation

   In addition, high-energy (high-speed) neutrons have the ability to directly ionize atoms. One mechanism by which high energy neutrons ionize atoms is to strike the nucleus of an atom and knock the atom out of a molecule, leaving one or more electrons behind as the chemical bond is broken. This leads to production of chemical free radicals. In ...

3. Cathode-ray tube - Wikipedia

   en.wikipedia.org/wiki/Cathode-ray_tube

   A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. [2] The images may represent electrical waveforms on an oscilloscope , a frame of video on an analog television set (TV), digital raster graphics on a computer monitor , or ...

4. Copyright infringement - Wikipedia

   en.wikipedia.org/wiki/Copyright_infringement

   Psion Software claimed in 1983 that software piracy cost it £2.9 million a year, 30% of its revenue. [89] Will Wright said that Raid on Bungeling Bay sold 20,000 copies for the Commodore 64 in the US, but 800,000 cartridges for the Nintendo Famicom with a comparable installed base in Japan, "because it's a cartridge system [so] there's ...

5. List of smoking bans - Wikipedia

   en.wikipedia.org/wiki/List_of_smoking_bans

   On 30 July 2012, Interior Minister Prince Ahmed bin Abdulaziz ordered the implementation of a royal ban on smoking in all government facilities (ministries, buildings, institutions, offices etc.) [221] and most indoor public places. The ban also prohibits smoking of hookahs in public places, and prohibits selling tobacco to anyone under 18.

6. Ocean - Wikipedia

   en.wikipedia.org/wiki/Ocean

   Of this fresh water, 68.9% is in the form of ice and permanent snow cover in the Arctic, the Antarctic and mountain glaciers; 30.8% is in the form of fresh groundwater; and only 0.3% of the fresh water on Earth is in easily accessible lakes, reservoirs and river systems.

7. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   By definition of Stirling numbers of the second kind, the probability that exactly T draws are needed is (,)! By manipulating the generating function of the Stirling numbers, we can explicitly calculate all moments of T: ():= (,) = = In general, the k-th moment is ()!