PHY 2020 Chapter Notes - Chapter 15: Expansion Joint, Thermal Expansion, Thermostat
Document Summary
Because of this random motion, the atoms and molecules in matter have kinetic energy. temperature. The quantity that indicates warmth with respect to some standards is called: the first (cid:498)thermal meter(cid:499) for measuring temperature, galileo invented. Nearly all materials expand when their temperature is raised and contract when thermometer, in 1602. their temperature is lowered. On the mostly widely used temperature scale, the international scale, the number 0 is assigned to the temperature at which water freezes and the number. 100 to the temperature at which water boils. The space between is divided into 100 equal parts called degrees; hence, a thermometer so calibrated has been called a centigrade thermometer. The number 32 is assigned to the temperature at which water freezes, and the number 212 is assigned to the temperature at which water boils. The kelvin scale is calibrated not in terms of the freezing and boiling points of water but in terms of energy itself.
