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  2. Observational error - Wikipedia

    en.wikipedia.org/wiki/Observational_error

    Measurement errors can be divided into two components: ... The term "observational error" is also sometimes used to refer to response errors and some other types of ...

  3. Instrument error - Wikipedia

    en.wikipedia.org/wiki/Instrument_error

    The range in amount of possible random errors is sometimes referred to as the precision. Random errors may arise because of the design of the instrument. In particular they may be subdivided between errors in the amount shown on the display, and; how accurately the display can actually be read.

  4. Measurement uncertainty - Wikipedia

    en.wikipedia.org/wiki/Measurement_uncertainty

    Measurement uncertainty. In metrology, measurement uncertainty is the expression of the statistical dispersion of the values attributed to a quantity measured on an interval or ratio scale. All measurements are subject to uncertainty and a measurement result is complete only when it is accompanied by a statement of the associated uncertainty ...

  5. Meniscus (liquid) - Wikipedia

    en.wikipedia.org/wiki/Meniscus_(liquid)

    In physics (particularly fluid statics ), the meniscus ( pl.: menisci, from Greek 'crescent') is the curve in the upper surface of a liquid close to the surface of the container or another object, produced by surface tension . A concave meniscus occurs when the attraction between the particles of the liquid and the container ( adhesion) is more ...

  6. Analytical chemistry - Wikipedia

    en.wikipedia.org/wiki/Analytical_chemistry

    Analytical chemistry studies and uses instruments and methods to separate, identify, and quantify matter. [ 1] In practice, separation, identification or quantification may constitute the entire analysis or be combined with another method. Separation isolates analytes.

  7. Weighing scale - Wikipedia

    en.wikipedia.org/wiki/Weighing_scale

    An industrial weighing scale is a device that measures the weight or mass of objects in various industries. It can range from small bench scales to large weighbridges, and it can have different features and capacities. Industrial weighing scales are used for quality control, inventory management, and trade purposes.

  8. Propagation of uncertainty - Wikipedia

    en.wikipedia.org/wiki/Propagation_of_uncertainty

    Propagation of uncertainty. In statistics, propagation of uncertainty (or propagation of error) is the effect of variables ' uncertainties (or errors, more specifically random errors) on the uncertainty of a function based on them. When the variables are the values of experimental measurements they have uncertainties due to measurement ...

  9. Physical chemistry - Wikipedia

    en.wikipedia.org/wiki/Physical_chemistry

    t. e. Physical chemistry is the study of macroscopic and microscopic phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mechanics, analytical dynamics and chemical equilibria . Physical chemistry, in contrast to chemical ...