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  2. Molecular vibration - Wikipedia

    en.wikipedia.org/wiki/Molecular_vibration

    A molecular vibration is a periodic motion of the atoms of a molecule relative to each other, such that the center of mass of the molecule remains unchanged. The typical vibrational frequencies range from less than 10 13 Hz to approximately 10 14 Hz, corresponding to wavenumbers of approximately 300 to 3000 cm −1 and wavelengths of approximately 30 to 3 μm.

  3. Solid solution strengthening - Wikipedia

    en.wikipedia.org/wiki/Solid_solution_strengthening

    Interstitial solid solutions form when the solute atom is small enough (radii up to 57% the radii of the parent atoms) [2] to fit at interstitial sites between the solvent atoms. The atoms crowd into the interstitial sites, causing the bonds of the solvent atoms to compress and thus deform (this rationale can be explained with Pauling's rules ...

  4. Reductions with hydrosilanes - Wikipedia

    en.wikipedia.org/wiki/Reductions_with_hydrosilanes

    Hydrosilanes can reduce 1,1-disubstituted double bonds that form stable tertiary carbocations upon protonation. Trisubstituted double bonds may be reduced selectively in the presence of 1,2-disubstituted or monosubstituted alkenes. [15] Aromatic compounds may be reduced with TFA and triethylsilane.

  5. Strengthening mechanisms of materials - Wikipedia

    en.wikipedia.org/wiki/Strengthening_mechanisms...

    Pinning points, or locations in the crystal that oppose the motion of dislocations, [5] can be introduced into the lattice to reduce dislocation mobility, thereby increasing mechanical strength. Dislocations may be pinned due to stress field interactions with other dislocations and solute particles, creating physical barriers from second phase ...

  6. Molecular mechanics - Wikipedia

    en.wikipedia.org/wiki/Molecular_mechanics

    A force field is used to minimize the bond stretching energy of this ethane molecule. Molecular mechanics uses classical mechanics to model molecular systems. The Born–Oppenheimer approximation is assumed valid and the potential energy of all systems is calculated as a function of the nuclear coordinates using force fields. Molecular ...

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  8. Supersedeas bond - Wikipedia

    en.wikipedia.org/wiki/Supersedeas_bond

    The bond required to obtain a stay of execution of a judgment while the judgment is being appealed is a supersedeas bond, also referred to as an appeal bond." [9] In Texas, the amount of a supersedeas bond (referred to as "security for judgments pending appeal" in the Texas Civil Practice and Remedies Code) is determined as follows: [10]

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