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Heat flow
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Heat flow

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Transcript

  • 1.
    • Why does mom use cloth to take a wok?
    Example from daily life
  • 2. Example from daily life
    • Have you ever grip ice cub?
    • What do you feel?
  • 3. Example from daily life
    • How does the heat flow from one place to another?
  • 4. HEAT FLOW
  • 5.
    • Objective:
    • To investigate the heat flow by conduction (in solid matters), convection (in liquid and gaseous matters) and radiation
    • To identify matter classified as conductor and insulator of heat
    • To Apply the heat flow concept in solving everyday physics problems such as a vacuum flask and a flat-iron
  • 6. Science word
    • Conduction Conductor Insulator
    • Convection
    • Radiation
  • 7.
    • Heat energy flows from a warm substance to a cooler substance.
    • Heat can be transferred by three processes:
    • conduction,
    • convection, and
    • radiation.
    Information
  • 8.  
  • 9. Heat can be transferred by three processes: conduction, convection, and radiation. Conduction is the transfer of heat along a solid object. Convection transfers heat through the exchange of hot and cold molecules. Radiation is the transfer of heat via electromagnetic (usually infrared) radiation.
  • 10. Stone Mercury Iron Wood Glass Gold Cloth
  • 11. Conduction
    • In conduction, heat is transferred through a material by the collision of adjacent atoms or molecules
  • 12. Conduction
    • If you look closely, what will you observe?
    menu
  • 13. Convection
    • In convection, particles of fluid move from one place to another carrying heat energy.
  • 14. Convection If you look closely, what will you observe? menu
  • 15. Radiation Radiation is the process of transferring heat through a vacuum (without medium) menu
  • 16. Heat flow Conduction Convection Radiation Solid Vacuum Liquid Gaseous Conductor Insulator
  • 17.
    • What does she use if she wants to keep her hand from heat ?
    Application
  • 18. Application
    • What do you use if you want to keep your drink cool or warm?
  • 19.  
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