9.2 Heat Flow and Thermal Equilibrium
Heat flows from a hot object to a cold object
Radiation
Convection
Conduction
Heat is transferred by the movement of liquid
Heat transfer from hotter regions to colder regions through a SOLID MEDIUM
The part of the liquid that receives heat will expand become less dense and rise
Particles that receive heat energy will VIBRATE and
COLLIDE with one another more frequently and transfer the heat to the whole medium
it's a process of transferring heat without any medium.
propagate through an empty space or vacuum.
The colder and more dense fluid moves downwards
The circulating stream that rises and falls continuously is known as convection current
Types of surface, temperature and total surface area of an object.
Heat Flow in Natural Phenomena
Heat Conductors
Heat insulators
Thermal insulation is the reduction of heat transfer between objects in thermal contact or in range of radiative influence.
Natural Convection Heat Transfer from a Rectangular Block Embedded in a Vertical Enclosure.
Good Conductors
Pure Silver, Pure copper, Pure gold, Aluminium, Zinc, Nickel, Brass, Bronze, Iron, Platinum,Steel,Lead,Stainless steel
Heat conduction (or thermal conduction) is the movement of heat from one solid to another one that has different temperature when they are touching each other.
Thermal Equilibrium
Two objects which are in thermal contact can exchange heat energy between them.
The heat energy is transferred from the object with a higher temperature to the object with a lower temperature