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Buoyancy definitions

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  • Buoyancy
    Upward force in a fluid or gas that opposes gravity, causing measured mass to differ from true mass on a balance.
  • Analytical Balance
    Precision instrument used to measure mass with high accuracy, sensitive to environmental factors like airflow.
  • Apparent Mass
    Value displayed by a balance, influenced by external factors such as air buoyancy, not the actual mass.
  • True Mass
    Actual mass of an object as if measured in a vacuum, free from the effects of air or buoyancy.
  • Air Density
    Mass per unit volume of air, typically 0.0012 g/mL at 1 bar and 25°C, used in buoyancy corrections.
  • Calibration Weight
    Reference object with known density, used to adjust and verify the accuracy of balances.
  • Density
    Ratio of mass to volume for a substance, crucial for correcting buoyancy effects in mass measurements.
  • Uncertainty
    Degree of doubt in a measurement, increased by factors like airflow and minimized by corrections.
  • Gravity
    Downward force acting on objects, counteracted by buoyancy when measuring mass in air.
  • Vacuum
    Environment devoid of air, eliminating buoyancy and airflow, allowing for true mass determination.
  • Precision
    Closeness of repeated measurements to each other, improved by accounting for buoyancy effects.
  • Accuracy
    Closeness of a measured value to the true value, enhanced by correcting for air buoyancy.
  • Alloy
    Mixture of metals, sometimes used for calibration weights, each with unique density affecting corrections.
  • Upward Force
    Component of buoyancy that acts opposite to gravity, altering the measured mass on a balance.
  • Equation
    Mathematical expression used to correct apparent mass for buoyancy, involving densities of air, weights, and object.