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  2. The best sales this weekend to know about: Vacuums, Coach ...

    www.aol.com/lifestyle/the-15-best-sales-this...

    Right now Coach Outlet is running an extra 15% off already-on-sale styles like this tote purse that's perfect for work. It's also a good time to save during Macy's summer sale, like this retro ...

  3. 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 ...

  4. Zero-coupon bond - Wikipedia

    en.wikipedia.org/wiki/Zero-coupon_bond

    t. e. A zero-coupon bond (also discount bond or deep discount bond) is a bond in which the face value is repaid at the time of maturity. [1] Unlike regular bonds, it does not make periodic interest payments or have so-called coupons, hence the term zero-coupon bond. When the bond reaches maturity, its investor receives its par (or face) value.

  5. Isotopes of oxygen - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_oxygen

    O. have also been characterized, all short-lived. The longest-lived radioisotope is 15. O. with a half-life of 122.266 (43) s, while the shortest-lived isotope is the unbound 11. O. with a half-life of 198 (12) yoctoseconds, though half-lives have not been measured for the unbound heavy isotopes 27. O. and 28.

  6. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    Sun. The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.

  7. Space Shuttle Challenger disaster - Wikipedia

    en.wikipedia.org/wiki/Space_Shuttle_Challenger...

    Rogers Commission Report. On January 28, 1986, the Space Shuttle Challenger broke apart 73 seconds into its flight, killing all seven crew members aboard. The spacecraft disintegrated 46,000 feet (14 km) above the Atlantic Ocean, off the coast of Cape Canaveral, Florida, at 11:39 a.m. EST (16:39 UTC ).