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  2. List of unsolved problems in physics - Wikipedia

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

    The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.

  3. Category:Unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/Category:Unsolved_problems...

    العربية; Azərbaycanca; تۆرکجه; বাংলা; 閩南語 / Bân-lâm-gú; Беларуская; Беларуская (тарашкевіца)

  4. Luminescence dating - Wikipedia

    en.wikipedia.org/wiki/Luminescence_dating

    Stimulating these mineral grains using either light (blue or green for OSL; infrared for IRSL) or heat (for TL) causes a luminescence signal to be emitted as the stored unstable electron energy is released, the intensity of which varies depending on the amount of radiation absorbed during burial and specific properties of the mineral.

  5. Civil Services Examination - Wikipedia

    en.wikipedia.org/wiki/Civil_Services_Examination

    This is an accepted version of this page This is the latest accepted revision, reviewed on 17 January 2025. Civil services examination in India This article is about the examination in India. For civil service examinations in general, see civil service entrance examination. This article may need to be rewritten to comply with Wikipedia's quality standards. You can help. The talk page may ...

  6. Platinum group - Wikipedia

    en.wikipedia.org/wiki/Platinum_group

    They have similar physical and chemical properties, and tend to occur together in the same mineral deposits. [2] However, they can be further subdivided into the iridium-group platinum-group elements (IPGEs: Os, Ir, Ru) and the palladium-group platinum-group elements (PPGEs: Rh, Pt, Pd) based on their behaviour in geological systems. [3]

  7. Natural resources of India - Wikipedia

    en.wikipedia.org/wiki/Natural_resources_of_India

    It is a group of complex silicate minerals and has similar chemical compositions. There are three groups of garnet - aluminum-garnet group, chromium-garnet group, and iron-garnet group. The minerals in aluminium-garnet group are almandine, grossularite, pyrope, and spessartine. The mineral in Iron-garnet group is andradite.

  8. Here’s the last day to send your gifts in time for the holidays

    www.aol.com/last-day-send-gifts-time-143042135.html

    Main Menu. News. News. Entertainment. Lighter Side. Politics. Science & Tech. Sports. Weather. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. ... - First-Class ...

  9. Stopping power (particle radiation) - Wikipedia

    en.wikipedia.org/wiki/Stopping_power_(particle...

    In nuclear and materials physics, stopping power is the retarding force acting on charged particles, typically alpha and beta particles, due to interaction with matter, resulting in loss of particle kinetic energy. [1] [2] Stopping power is also interpreted as the rate at which a material absorbs the kinetic energy of a charged particle.