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Physics Unit 0ne, Subunit Four. Potential Energy = Energy due to an objects position. Kinetic Energy= Energy due to the motion of an object.
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Potential Energy = Energy due to an objects position. • Kinetic Energy= Energy due to the motion of an object.
Thermal Energy = The total energy of the thermal motion of all the particles thermal motion. (the random motion of vibration of an object’s atoms and molecules)
Temperature = is the measure of an average kinetic energy of the random motion of the atoms and molecules of a body.
Temperature is measure with thermometers. • Thermometers uses expansion and contraction of liquids, usually alcohol or mercury to measure temperature.
Celsius Fahrenheit • Water Freezes 0 32 • Water boils 100 212
A meteorologist forecasts a high temperature of 50*F. What is the predicted high temperature in degrees Celsius?
A thermostat is set to keep the temperature of a room at 20* C. What is the thermostat setting in degrees fahrenheit?
The transfer of heat energy from one body to another one due to particles colliding • is called conduction. • Heat is the energy that flows from one object to another because of temperature difference. • Heat energy is measured in joules or calories. BTU (british thermal unit)
Heat energy always flow from a hot body to a colder body. • Temperature Difference is the forcelike or prime mover in thermal systems.
Thermocouple is a temperature-measuring device that depends on changes in the electrical properties of certain metals for its operation.
Calorie is the amount of thermal energy that must be added to change the temperature of 1 gram of water 1 degree celsius. • Btu is the amount of thermal energy that must be added to change the temperature of 1 pound of water one degree fahrenheit.
Specific Heat of a substance is the amount of energy that must be added to raise the temperature of a unit mass of the substance one temperature unit.
Q= Heat transferredm = Objects massC= specific heatT= temperature difference
The amount of heat required to melt one gram of a substance is called Heat of Fusion. • The amount of heat required to vaporize one gram of substance is called its Heat of Vaporization
