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    Transmission of Heat: Presented by V.Rajalakshmi II-B.Sc (Physics) 13UPHY024

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    shajmalik
    The document discusses the three main ways that heat is transferred: conduction, convection, and radiation. Conduction involves the transfer of heat between particles in direct contact within an object. Convection is the transfer of heat by the movement of fluids like gases and liquids. Radiation transfers heat through electromagnetic waves and does not require direct contact between the warm object and cooler one.

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    Transmission of Heat: Presented by V.Rajalakshmi II-B.Sc (Physics) 13UPHY024

    Uploaded by

    shajmalik
    64 views11 pages
    The document discusses the three main ways that heat is transferred: conduction, convection, and radiation. Conduction involves the transfer of heat between particles in direct contact within an object. Convection is the transfer of heat by the movement of fluids like gases and liquids. Radiation transfers heat through electromagnetic waves and does not require direct contact between the warm object and cooler one.

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    heat transmission

    Original Title

    Heat Transmission 1

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    The document discusses the three main ways that heat is transferred: conduction, convection, and radiation. Conduction involves the transfer of heat between particles in direct contact within an object. Convection is the transfer of heat by the movement of fluids like gases and liquids. Radiation transfers heat through electromagnetic waves and does not require direct contact between the warm object and cooler one.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    64 views11 pages

    Transmission of Heat: Presented by V.Rajalakshmi II-B.Sc (Physics) 13UPHY024

    Uploaded by

    shajmalik
    The document discusses the three main ways that heat is transferred: conduction, convection, and radiation. Conduction involves the transfer of heat between particles in direct contact within an object. Convection is the transfer of heat by the movement of fluids like gases and liquids. Radiation transfers heat through electromagnetic waves and does not require direct contact between the warm object and cooler one.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    of 11

    PRESENTED BY

    V.RAJALAKSHMI
    II-B.Sc (Physics)
    13UPHY024

    TRANSMISSION OF HEAT

    Heat Transfer
    Conduction, Convection and Radiation

    Thermal Energy Transfer


    Thermal energy transfer is heat moving from a
    warmer object to a cooler object. This is
    known as thermal energy transfer.

    How is Heat Transferred?


    There are THREE ways heat can move.
    Conduction
    Convection
    Radiation

    CONDUCTION
    Heat is transferred from one particle of
    matter to another in an object without the
    movement of the object.
    Conduction = CONTACT

    Have you ever


    Touched a metal spoon sitting in a pan of boiling
    water only to be surprised by HOW hot it is??

    Think back to what you know about metals and


    nonmetals. What conducts heat better, metal or
    nonmetal? Why?

    Think of a metal spoon in a pot of


    water being heated.
    The fast-moving particles of the
    fire collide with the slow-moving
    particles of the cool pot.
    Because of these collisions, the
    slower particles move faster and
    heat is transferred.
    Then the particles of the pot
    collide with the particles in the
    water, which collide with the
    particles at one end of the spoon.
    As the particles move faster, the
    metal spoon gets hotter. This
    process of conduction is
    repeated all along the metal until
    the entire spoon is hot.

    Example of Conduction

    RADIATION
    Radiation is the transfer of energy by
    electromagnetic waves
    Radiation does NOT require matter to transfer
    thermal energy
    Radiation = Radiates (heat escaping the sun)

    Examples of RADIATION
    1. Fire
    2. Heat Lamps
    3. Sun

    3 Ways Energy (Heat) is Transferred


    *Transferred in rays or
    waves
    *Energy from the Sun
    warms the Earth

    *Transfer of heat (energy)


    that happens when
    molecules bump into
    each other
    *Objects must be
    touching
    *Conduction is touchin

    *Transfer of heat by the flow


    of material
    *In warm air, the molecules
    move apart, so it is less
    dense and rises
    *In cooler air, the molecules
    move closer together, so it is
    more dense and sinks

    Example:

    Example:

    Example:

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