Heat (Physics)
WEeb.in Team Science Total Views: 538 Posted: Feb 6, 2020 Updated: Oct 3, 2026
HEAT
- Heat is the form of energy transferred between two (or more) systems or a system and its surroundings by virtue of temperature difference.
- SI unit of Heat is Joule and SI unit of Temperature is Kelvin/ Celsius/ Fahrenheit
- Absolute zero, temperature at which a thermodynamic system has the lowest energy. It corresponds to −273.15 °C on the Celsius temperature scale and to −459.67 °F on the Fahrenheit temperature scale
- Heat flows from one object to another in three ways:
| Conduction | Convection | Radiation |
| The process by which heat is transferred from the hotter end to the colder end of an object
Conduction happens generally in Solids The materials which allow heat to pass through them easily are conductors of heat. Ex: Aluminum The materials which do not allow heat to pass through them easily are poor conductors of heat and are called Insulators Ex: Wood |
Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids
Convection happens in Liquids and Gases |
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization |
| Specific Heat Capacity of the substance | The amount of heat energy required to raise the temperature of 1gram of a substance through 1° is called |
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