General questions Flashcards
What is convection
When heat energy in liquid or gas take the place of particles with less heat energy.
What is conservation of energy
conservation of energy states that energy can neither be created nor be destroyed.
What is conduction
heat energy is transmitted through collisions between neighbouring atoms or molecules.
What is radiation
Radiation is energy that comes from a source and travels through space at the speed of light.
What is insulation
Insulation means creating a barrier between the hot and the cold object that reduces heat transfer by either reflecting thermal radiation or decreasing thermal conduction and convection from one object to the other.
What is thermal conductivity
the rate at which heat is transferred by conduction through a unit cross-section area of a material.
