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  2. Argon - Wikipedia

    en.wikipedia.org/wiki/Argon

    Ar contamination. Most of the argon in Earth's atmosphere was produced by electron capture of long-lived 40 K (40 K + e − → 40 Ar + ν) present in natural potassium within Earth. The 39 Ar activity in the atmosphere is maintained by cosmogenic production through the knockout reaction 40 Ar (n,2n) 39 Ar and similar reactions. The half-life of 39

  3. Isotopes of argon - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_argon

    Despite the trapping of 40 Ar in many rocks, it can be released by melting, grinding, and diffusion. Almost all argon in the Earth's atmosphere is the product of 40 K decay, since 99.6% of Earth's atmospheric argon is 40 Ar, whereas in the Sun and presumably in primordial star-forming clouds, argon consists of < 15% 38 Ar and mostly (85%) 36 Ar.

  4. Wheelchair ramp - Wikipedia

    en.wikipedia.org/wiki/Wheelchair_ramp

    A concrete wheelchair ramp A portable wheelchair ramp. A wheelchair ramp is an inclined plane installed in addition to or instead of stairs. Ramps permit wheelchair users, as well as people pushing strollers, carts, or other wheeled objects, to more easily access a building, or navigate between areas of different height. Ramps for accessibility ...

  5. Argon–argon dating - Wikipedia

    en.wikipedia.org/wiki/Argonargon_dating

    Argon–argon (or 40 Ar/ 39 Ar) dating is a radiometric dating method invented to supersede potassium–argon (K/Ar) dating in accuracy. The older method required splitting samples into two for separate potassium and argon measurements, while the newer method requires only one rock fragment or mineral grain and uses a single measurement of argon isotopes.

  6. Best Gas Grills of 2022, according to Consumer Reports - AOL

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    The top-scoring models from Consumer Reports' tests heat quickly and cook evenly ... SEE ALL Consumer Reports product reviews. ... Weber Spirit E-210 46110001 $610.80 at Amazon.

  7. Amphion Argon1 Review: Beautiful Finnish speakers with an ...

    www.aol.com/amphion-argon1-review-beautiful...

    The quality of a speaker's soundstage depends not only on the sound that travels in a direct path from the speaker to your ears, but also on the sound that reflects off your walls before you hear it.

  8. Paschen's law - Wikipedia

    en.wikipedia.org/wiki/Paschen's_law

    Different gases will have different mean free paths for molecules and electrons. This is because different molecules have ionization cross sections, that is, different effective diameters. Noble gases like helium and argon are monatomic, which makes them harder to ionize and tend to have smaller effective diameters. This gives them greater mean ...

  9. Argon compounds - Wikipedia

    en.wikipedia.org/wiki/Argon_compounds

    Argon compounds, the chemical compounds that contain the element argon, are rarely encountered due to the inertness of the argon atom. However, compounds of argon have been detected in inert gas matrix isolation, cold gases, and plasmas, and molecular ions containing argon have been made and also detected in space.

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