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  2. Inclinometer - Wikipedia

    en.wikipedia.org/wiki/Inclinometer

    An inclinometer sensor's true or absolute accuracy (which is the combined total error), however, is a combination of initial sets of sensor zero offset and sensitivity, sensor linearity, hysteresis, repeatability, and the temperature drifts of zero and sensitivity—electronic inclinometers accuracy can typically range from ±0.01–2 ...

  3. Tiltmeter - Wikipedia

    en.wikipedia.org/wiki/Tiltmeter

    The 2-axis MEMS driven inclinometers/ tiltmeters can be digitally compensated and precisely calibrated for non-linearity and operating temperature variation, resulting in higher angular accuracy and stability performance over wider angular measurement range and broader operating temperature range.

  4. Point groups in three dimensions - Wikipedia

    en.wikipedia.org/wiki/Point_groups_in_three...

    The groups D 2 and D 2h are noteworthy in that there is no special rotation axis. Rather, there are three perpendicular 2-fold axes. D 2 is a subgroup of all the polyhedral symmetries (see below), and D 2h is a subgroup of the polyhedral groups T h and O h. D 2 occurs in molecules such as twistane and in homotetramers such as Concanavalin A.

  5. Liquid capacitive inclinometers - Wikipedia

    en.wikipedia.org/.../Liquid_capacitive_inclinometers

    Liquid capacitive inclinometers are inclinometers (or clinometers) whose sensing elements are made with a liquid-filled differential capacitor; they sense the local direction of acceleration due to gravity (or movement). [1] A capacitive inclinometer has a disc-like cavity that is partly filled with a dielectric liquid.

  6. Glossary of chemical formulae - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemical_formulae

    This is a list of common chemical compounds with chemical formulae and CAS numbers, indexed by formula.This complements alternative listing at list of inorganic compounds. ...

  7. Law of rational indices - Wikipedia

    en.wikipedia.org/wiki/Law_of_rational_indices

    Miller indices of a plane (hkl) and a direction [hkl].The intercepts on the axes are at a/ h, b/ k and c/ l. The International Union of Crystallography (IUCr) gives the following definition: "The law of rational indices states that the intercepts, OP, OQ, OR, of the natural faces of a crystal form with the unit-cell axes a, b, c are inversely proportional to prime integers, h, k, l.

  8. Molecular symmetry - Wikipedia

    en.wikipedia.org/wiki/Molecular_symmetry

    Symmetry elements of formaldehyde. C 2 is a two-fold rotation axis. σ v and σ v ' are two non-equivalent reflection planes.. In chemistry, molecular symmetry describes the symmetry present in molecules and the classification of these molecules according to their symmetry.

  9. Turn and slip indicator - Wikipedia

    en.wikipedia.org/wiki/Turn_and_slip_indicator

    The slip indicator is actually an inclinometer that at rest displays the angle of the aircraft's transverse axis with respect to horizontal, and in motion displays this angle as modified by the acceleration of the aircraft. [1] The most commonly used units are degrees per second (deg/s) or minutes per turn (min/tr). [citation needed]