Loading...
So, in an empty space or vacuum heat is transferred by radiation We shall now study heat transfer by conduction, convection, and radiation in detail What is
Because there is no substance to travel through, heat from the Sun can't reach us by conduction or convection Only radiation can travel through empty space
Heat is transferred, for example, from the sun to the earth through mostly empty space - such a transfer cannot occur via convection nor conduction,
moving through the space of its container Stick a thermometer in the cup of water and you will see the evidence that the water possesses kinetic energy
As you read about the three types of heat transfer, pay attention to: • What the heat is moving through (solids, liquids and gases, or empty space)
Both conduction and convection require matter to transfer heat, but radiation can travel through space If there is a temperature difference between two
Like light, heat waves can travel through air—they can even move through empty space Think about standing around a campfire or in front of a fire in a
?Thermal energy transfer is heat moving ?Radiation is heat transfer through space by electromagnetic waves Radiation can occur in empty space,
within fluids (convection), and heat transfer through empty space (radiation) Notice that heat (related to a path integral in a closed control volume in
Radiation- absorption is the process by which thermal energy is transferred through empty space Home heating and cooling involve all three processes
Heat always moves from a warmer place to a cooler Cold objects in a warmer room will heat up across empty space or transfer energy between particles of
CONDUCTION: Conduction is the transfer of heat between substances that are in Heat can be transmitted though empty space by thermal radiation often
or particles, to transfer thermal energy For example, all of the sun's thermal energy must travel through 150 million kilometers of empty space to reach Earth