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2. Gamma-ray burst - Wikipedia

   en.wikipedia.org/wiki/Gamma-ray_burst

   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 ...

3. List of alcohol laws of the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_alcohol_laws_of...

   21 No off-sale on Thanksgiving Day after 2 a.m. No Christmas Day on-sale, nor sales on Christmas Eve after 6 p.m. Ohio No Yes 5:30 a.m. – 2:30 a.m. 5:30 a.m. – 1 a.m. Yes, under 21% ABV 21 21 or older, unrestricted under supervision of individual's parent or legal guardian or legal age spouse

4. Electromagnetic radiation - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_radiation

   Only 30% of the Sun's ultraviolet light reaches the ground, and almost all of this is well transmitted. Visible light is well transmitted in air, a property known as an atmospheric window , as it is not energetic enough to excite nitrogen, oxygen, or ozone, but too energetic to excite molecular vibrational frequencies of water vapor and CO2.

5. Phase-out of incandescent light bulbs - Wikipedia

   en.wikipedia.org/wiki/Phase-out_of_incandescent...

   According to this source, 1 November 2011 to 30 September 2012 will be a transitional period and as of 1 October 2012, imports and sales of ordinary incandescent bulbs of 100 watts or more will be prohibited. The first phase will be followed by a ban on 60-watt-and-higher incandescent light bulbs starting in October 2014.

6. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...

7. Free-software license - Wikipedia

   en.wikipedia.org/wiki/Free-software_license

   SLUC is a software license published in Spain in December 2006 to allow all but military use. The writers of the license maintain it is free software, but the Free Software Foundation says it is not free because it infringes the so-called "zero freedom" of the GPL, that is, the freedom to use the software for any purpose. Market share