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  2. Temperature dependence of viscosity - Wikipedia

    en.wikipedia.org/wiki/Temperature_dependence_of...

    where an additional function (), often a polynomial fit to experimental data, has been added to the Walther formula. The Seeton model is based on curve fitting the viscosity dependence of many liquids ( refrigerants , hydrocarbons and lubricants) versus temperature and applies over a large temperature and viscosity range:

  3. Negative temperature - Wikipedia

    en.wikipedia.org/wiki/Negative_temperature

    The possibility of negative temperatures was first predicted by Lars Onsager in 1949. [4] Onsager was investigating 2D vortices confined within a finite area, and realized that since their positions are not independent degrees of freedom from their momenta, the resulting phase space must also be bounded by the finite area.

  4. Conversion of scales of temperature - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_scales_of...

    To convert a delta temperature from degrees Fahrenheit to degrees Celsius, the formula is {ΔT} °F = ⁠ 9 / 5 ⁠ {ΔT} °C. To convert a delta temperature from degrees Celsius to kelvin, it is 1:1 ({ΔT} °C = {ΔT} K).

  5. Cold inflation pressure - Wikipedia

    en.wikipedia.org/wiki/Cold_inflation_pressure

    Cold inflation pressure should therefore be measured in the morning, as this is the coldest time of day. This will ensure a tire meets or exceeds the required inflation pressure at any time of day. Seasonal temperature fluctuations can also result in appreciable changes in tire pressure, and a tire that is properly inflated in the summer is ...

  6. Ideal gas law - Wikipedia

    en.wikipedia.org/wiki/Ideal_gas_law

    Isotherms of an ideal gas for different temperatures. The curved lines are rectangular hyperbolae of the form y = a/x. They represent the relationship between pressure (on the vertical axis) and volume (on the horizontal axis) for an ideal gas at different temperatures: lines that are farther away from the origin (that is, lines that are nearer to the top right-hand corner of the diagram ...

  7. Q10 (temperature coefficient) - Wikipedia

    en.wikipedia.org/wiki/Q10_(temperature_coefficient)

    The Q 10 coefficient represents the degree of temperature dependence a muscle exhibits as measured by contraction rates. [2] A Q 10 of 1.0 indicates thermal independence of a muscle whereas an increasing Q 10 value indicates increasing thermal dependence. Values less than 1.0 indicate a negative or inverse thermal dependence, i.e., a decrease ...

  8. Rankine scale - Wikipedia

    en.wikipedia.org/wiki/Rankine_scale

    Similar to the Kelvin scale, which was first proposed in 1848, [1] zero on the Rankine scale is absolute zero, but a temperature difference of one Rankine degree (°R or °Ra) is defined as equal to one Fahrenheit degree, rather than the Celsius degree used on the Kelvin scale.

  9. Scale of temperature - Wikipedia

    en.wikipedia.org/wiki/Scale_of_temperature

    The degree CelsiusC) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval (a difference between two temperatures). From 1744 until 1954, 0 °C was defined as the freezing point of water and 100 °C was defined as the boiling point of water, both at a pressure of one standard atmosphere.