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  2. Pyrgeometer - Wikipedia

    en.wikipedia.org/wiki/Pyrgeometer

    A pyrgeometer is a device that measures near-surface infra-red (IR) radiation, approximately from 4.5 μm to 100 μm on the electromagnetic spectrum (thereby excluding solar radiation). It measures the resistance / voltage changes in a material that is sensitive to the net energy transfer by radiation that occurs between itself and its ...

  3. AP World History: Modern - Wikipedia

    en.wikipedia.org/wiki/AP_World_History:_Modern

    AP World History: Modern was designed to help students develop a greater understanding of the evolution of global processes and contacts as well as interactions between different human societies. The course advances understanding through a combination of selective factual knowledge and appropriate analytical skills.

  4. Category:Textbooks - Wikipedia

    en.wikipedia.org/wiki/Category:Textbooks

    A textbook is a manual of instruction or a standard book in any branch of study. Subcategories This category has the following 16 subcategories, out of 16 total.

  5. Pyranometer - Wikipedia

    en.wikipedia.org/wiki/Pyranometer

    A pyranometer (from Greek πῦρ (pyr) 'fire' and ἄνω (ano) 'above, sky') is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m 2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm.

  6. T. Walter Wallbank - Wikipedia

    en.wikipedia.org/wiki/T._Walter_Wallbank

    Wallbank taught history at the University of Southern California from 1933 to 1964. He collaborated with Alastair M. Taylor to write Civilization Past & Present. Civilization (1942) was the first world-history textbook published in the United States to enjoy great success in sales. [1] Other authors eventually joined the writing team for later ...

  7. AP United States History - Wikipedia

    en.wikipedia.org/wiki/AP_United_States_History

    The AP U.S. History course is designed to provide the same level of content and instruction that students would face in a freshman-level college survey class. It generally uses a college-level textbook as the foundation for the course and covers nine periods of U.S. history, spanning from the pre-Columbian era to the present day. The percentage ...

  8. Knut Ångström - Wikipedia

    en.wikipedia.org/wiki/Knut_Ångström

    Knut Johan Ångström (12 January 1857 – 4 March 1910) was a Swedish physicist.He was the son of physicist Anders Jonas Ångström and studied in Uppsala from 1877 to 1884, when he received his licentiat-degree, before going for a short time to the University of Strassburg to study with August Kundt.

  9. Wikibooks - Wikipedia

    en.wikipedia.org/wiki/Wikibooks

    Growth of the eight largest Wikibooks sites (by language), July 2003–January 2010. Wikibooks (previously called Wikimedia Free Textbook Project and Wikimedia-Textbooks) is a wiki-based Wikimedia project hosted by the Wikimedia Foundation for the creation of free content digital textbooks and annotated texts that anyone can edit.

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