ABSTRACT
This chapter focuses on temperature, heat, and heat transfer. It describes how to measure these quantities and how to control them. A glass thermometer has a liquid inside it that expands in a definite way when heated. When a glass thermometer is placed into a pot of boiling water, the molecules of the liquid inside the thermometer will begin to move faster, causing the liquid to expand and rise up in the thermometer. A voltage is developed across the junction and is proportional to the temperature of the junction. A reference junction is used to obtain measurements with respect to a known reference temperature. Optical pyrometers determine temperature by measuring the light emitted by a hot object. The thermal insulation you buy from a store has a value attached to it, which determines its insulating properties. Many homes are heated with convection heating. A fan blows air over a furnace core, transferring its heat throughout the home using heating ducts.
