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  2. Brimstone (missile) - Wikipedia

    en.wikipedia.org/wiki/Brimstone_(missile)

    Brimstone is a ground or air-launched ground attack missile developed by MBDA UK for the UK's Royal Air Force. [9] It was originally intended for "fire-and-forget" use against mass formations of enemy armour, using a millimetre wave (mmW) active radar homing seeker to ensure accuracy even against moving targets.

  3. List of unsolved problems in chemistry - Wikipedia

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

    This article's factual accuracy is disputed. Relevant discussion may be found on the talk page . Please help to ensure that disputed statements are reliably sourced .

  4. Flowers of sulfur - Wikipedia

    en.wikipedia.org/wiki/Flowers_of_sulfur

    Airflow and temperature are the only variables in this test that need to be controlled. [14] After a few days, the amount of corrosion and colour is noted. Various analytical methods can be used to examine the product’s surface morphology, surface composition, depth profiling, and metal foil thickness.

  5. Fire-and-forget - Wikipedia

    en.wikipedia.org/wiki/Fire-and-forget

    The RAF's Brimstone missile is a fire-and-forget anti-tank missile.. Fire-and-forget [1] [2] is a type of missile guidance which does not require further external intervention after launch such as illumination of the target or wire guidance, and can hit its target without the launcher being in line-of-sight of the target.

  6. Flame test - Wikipedia

    en.wikipedia.org/wiki/Flame_test

    [7] [8] [6] Sodium is a common component or contaminant in many samples, [2] and its spectrum tends to dominate many flame tests others. [5] The test flame is often viewed through cobalt blue glass to filter out the yellow of sodium and allow for easier viewing of other metal ions.

  7. Physical chemistry - Wikipedia

    en.wikipedia.org/wiki/Physical_chemistry

    Which reactions do occur and how fast is the subject of chemical kinetics, another branch of physical chemistry. A key idea in chemical kinetics is that for reactants to react and form products , most chemical species must go through transition states which are higher in energy than either the reactants or the products and serve as a barrier to ...

  8. How Does the 'Lessons in Chemistry' Series Compare to ... - AOL

    www.aol.com/does-lessons-chemistry-series...

    When Mad is a baby, in an enterprising move, the series stays true to the book as Elizabeth charges the Hastings scientists whenever they need assistance with their work—which is a lot.

  9. Chemical impurity - Wikipedia

    en.wikipedia.org/wiki/Chemical_impurity

    In chemistry and materials science, impurities are chemical substances inside a confined amount of liquid, gas, or solid. They differ from the chemical composition of the material or compound. [ 1 ] Firstly, a pure chemical should appear in at least one chemical phase and can also be characterized by its phase diagram .