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Physics
| Question | Answer |
|---|---|
| Thermodynamics | Study the relationship between heat and the flow and transformation of energy in the universe |
| Heat | Transfer of thermal energy from one object to another due to a difference in temperature |
| Kinetic-Molecular Theory | In a hot object the particles move faster and thus have greater kinetic energy than particles in a cooler object |
| Thermal Energy | The total kinetic energies of the molecules/particles that make up an object |
| Temperature | The average kinetic energy of particles in a object |
| Thermometer | A device that measures temperature (It relies on thermal expansion of a fluid in a sealed tube) |
| Absolute Zero | The temperature at which particles have zero kinetic energy (Particles stop moving = 273 K or -273 degrees Celsius) |
| Kelvin | A temperature scale used by scientists to measure thermal energy (Starts at zero and measures the actual energy of atoms) |
| Radiation | Transfer of thermal energy through electromagnetic waves |
| Specific Heat Capacity | The amount of energy added/removed to raise/lower the temperature of a unit of mass by one degree |
| Q | Symbol (Variable) for heat |
| J | Unit for heat (Thermal energy transferred) |
| Delta T | Change in temperature (Final Temp. - Initial Temp.) |
| Fahrenheit | Water freezes at 32 degrees and boils at 212 degrees and human body temperature is around 98.6 |
| Celsius | Metric unit for measuring temperature (Water freezes at zero and boils at 100. Kelvin -273) |
| Phase Change | A reversible physical change that occurs when a substance changes from one state of matter to another |
| Vaporization (Boiling) | The change of state from a liquid to a gas |
| Conduction | The transfer of heat by the direct contact of particles of matter |
| Thermal Conductor | A material that conducts thermal energy well (heats and cools rapidly, low heat capacity) |
| Thermal Insulator | A material that conducts thermal energy poorly (heats and cools slowly, high heat capacity) |
| Entropy | A measure of disorder or randomness |
| 1st Law of Thermodynamics | Energy can be changed, but can't be created or destroyed |
| 2nd Law of Thermodynamics | Energy cannot be changed from one form to another without a loss of usable energy. |
| 3rd Law of Thermodynamics | Absolute zero cannot be reached |
| 0th Law of Thermodynamics | If two systems are in thermal equilibrium with a third system, then they are in thermal equilibrium with each other |
| Calorimeter | A device used to measure changes in thermal energy |
| Convection | The transfer of thermal energy by the motion of a fluid |
Created by:
mv383931
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