Coefficients are numerical factors that represent the relationship between physical quantities in mathematical equations. In physics coefficients such as the coefficient of expansion or friction are used to quantify how a material responds to external forces or changes in conditions like temperature and pressure. These coefficients are dimension-specific.
Chapter 10 Thermal Properties of Matter deals with concepts like temperature heat and thermal expansion. It explains how heat affects materials causing changes in their temperature and size. The chapter covers the laws of thermodynamics and various thermometric devices used to measure temperature. The expansion of solids liquids and gases is also discussed.
The coefficient of apparent expansion of a liquid is the increase in volume per unit volume of the liquid when heated, as measured by a container. It takes into account both the expansion of the liquid and the container.
The coefficient of real expansion of a liquid is the actual increase in volume per unit volume of the liquid, ignoring the effects of the container.
The relation between the two is given as:
Real expansion = Apparent expansion + Coefficient of linear expansion of the container × Coefficient of volume expansion of the container
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