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  2. Vacuum tube - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube

    Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] thermionic valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.

  3. Georg Wilhelm Friedrich Hegel - Wikipedia

    en.wikipedia.org/wiki/Georg_Wilhelm_Friedrich_Hegel

    [10] [5] [11] Sharing a dislike for what they regarded as the restrictive environment of the Seminary, the three became close friends and mutually influenced each other's ideas. (It is mostly likely that Hegel attended the Stift because it was state-funded, for he had "a profound distaste for the study of orthodox theology" and never wanted to ...

  4. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  5. Cancer - Wikipedia

    en.wikipedia.org/wiki/Cancer

    Another common example is the class of Bcr-Abl inhibitors, which are used to treat chronic myelogenous leukemia (CML). [4] Currently, targeted therapies exist for many of the most common cancer types, including bladder cancer , breast cancer, colorectal cancer , kidney cancer , leukemia , liver cancer , lung cancer, lymphoma , pancreatic cancer ...

  6. Human nutrition - Wikipedia

    en.wikipedia.org/wiki/Human_nutrition

    The recommended daily allowance of zinc is 11 mg for older men and 8 mg for older women, with an upper tolerable limit of 25–40 mg per day, including both dietary and supplemental sources. However, individuals over 60 often consume less than 50% of the recommended zinc intake, which is crucial for proper body function.

  7. History of Pakistan (1947–present) - Wikipedia

    en.wikipedia.org/wiki/History_of_Pakistan_(1947...

    On 11 March 1983, PAEC led by Munir Ahmad Khan carried out the first successful cold test of a working nuclear device near at the Kirana Hills under codename Kirana-I. [ citation needed ] The test was led by CERN - physicist Dr. Ishfaq Ahmad , and was witnessed by other senior scientists belonging to Pakistan Armed Forces and the PAEC.

  8. Textbook - Wikipedia

    en.wikipedia.org/wiki/Textbook

    Given that the problem of high textbook prices is linked to the "broken" economics of the market, requiring publishers to disclose textbook prices to faculty is a solution pursued by a number of legislatures. [23] By inserting price into sales interactions, this regulation will supposedly make the economic forces operate more normally.

  9. Consciousness - Wikipedia

    en.wikipedia.org/wiki/Consciousness

    Proposed solutions can be divided broadly into two categories: dualist solutions that maintain Descartes's rigid distinction between the realm of consciousness and the realm of matter but give different answers for how the two realms relate to each other; and monist solutions that maintain that there is really only one realm of being, of which ...