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  1. PEN - Penumbra, Inc.

    Yahoo Finance

    189.47+1.46 (+0.78%)

    at Fri, May 31, 2024, 4:00PM EDT - U.S. markets closed

    Delayed Quote

    • Open 188.55
    • High 191.17
    • Low 187.00
    • Prev. Close 188.01
    • 52 Wk. High 348.67
    • 52 Wk. Low 180.93
    • P/E 79.28
    • Mkt. Cap 7.34B
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  3. History of radiation protection - Wikipedia

    en.wikipedia.org/wiki/History_of_radiation...

    § 20 § 20 Röntgenverordnung (röv_1987) [§ 20 X-ray Ordinance] (in German) and § Annex+2 Annex 2 (to § 8 para. 1 sentence 1 RöV) (röv_1987) (in German) Depending on the application, nuclear medicine requires even more extensive protective measures, up to and including concrete walls several meters thick.

  4. Cost of electricity by source - Wikipedia

    en.wikipedia.org/wiki/Cost_of_electricity_by_source

    Block 5 of Irsching Power Station in Southern Germany uses natural gas as fuel in a combined cycle converting 1750 megawatts of thermal energy to 847 net MW of usable electricity. It cost €450 million to build. This works out to some €531 per kW of capacity. However, due to the uneconomical prospect of operating it as a peaking power plant ...

  5. Project Excalibur - Wikipedia

    en.wikipedia.org/wiki/Project_Excalibur

    Project Excalibur was a Lawrence Livermore National Laboratory (LLNL) Cold War –era research program to develop an X-ray laser system as a ballistic missile defense (BMD) for the United States. The concept involved packing large numbers of expendable X-ray lasers around a nuclear device, which would orbit in space.

  6. United States twenty-dollar bill - Wikipedia

    en.wikipedia.org/wiki/United_States_twenty...

    Design. White House. Design date. 2003. The United States twenty-dollar bill (US$20) is a denomination of U.S. currency. A portrait of Andrew Jackson, the seventh U.S. president (1829–1837), has been featured on the obverse of the bill since 1928; the White House is featured on the reverse. As of December 2018, the average life of a $20 bill ...

  7. Killing of JonBenét Ramsey - Wikipedia

    en.wikipedia.org/wiki/Killing_of_JonBenét_Ramsey

    Patsy Ramsey. (mother) JonBenét Patricia Ramsey (August 6, 1990 – December 25, 1996) [1] was an American child beauty queen who was killed at the age of six in her family's home at 755 15th Street [2] [a] in Boulder, Colorado. A long handwritten ransom note was found in the home.

  8. Strategic Defense Initiative - Wikipedia

    en.wikipedia.org/wiki/Strategic_Defense_Initiative

    The Strategic Defense Initiative ( SDI ), derisively nicknamed the Star Wars program, was a proposed missile defense system intended to protect the United States from attack by ballistic nuclear missiles. The concept was announced in 1983, by President Ronald Reagan, [1] a critic of the doctrine of mutually assured destruction (MAD), which he ...