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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