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Physics Project HEAT CONDUCTION

Physics Project HEAT CONDUCTION. Group members: Ian Leck (Leader) Glenn Yeo Leon Lim Zhong Heng. What is conduction?.

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Physics Project HEAT CONDUCTION

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  1. Physics ProjectHEAT CONDUCTION Group members: Ian Leck (Leader) Glenn Yeo Leon Lim Zhong Heng

  2. What is conduction? • Conduction is heat transfer by means of molecular agitation within a material without any motion of the material as a whole. If one end of a metal rod is at a higher temperature, then energy will be transferred down the rod toward the colder end because the higher speed particles will collide with the slower ones with a net transfer of energy to the slower ones. Did you Know? Thermal energy in the form of continuous random motion of the particles of the matter, is transferred by the same coulomb forces that act to support the structure of matter, so can be said to move by physical contact between the particles.

  3. Example…… • For example, an aluminium bar is heated at one end. The particles that are heated gained energy from the flame and started to vibrate. As they vibrate, they collide with neighbouring particles. The neighbouring particles also started to vibrate and thus, energy is passed on from the heated end to the cooler end.

  4. Example…… • Like in our home, the heat is transferred through the wall. Or like when we put our metal spoons in a bowl of hot soup to cool it. Inside Outside

  5. What are Heat Conductors? • Heat conductors are materials that allow heat to flow through them quickly. Some examples are steel and iron. Steel Iron Did you know? The law of heat conduction, also known as Fourier's law, states that the time rate of heat transfer through a material is proportional to the negative gradient in the temperature and to the area at right angles, to that gradient, through which the heat is flowing.

  6. What are Heat Insulators? • Heat insulators are material that do not allow heat to pass through them quickly. Some examples are wood and glass. Glass Wood

  7. Q&A

  8. Q.1 • What is conduction? a) The transfer of heat in which energy from particles in the warmer region is passed on to particles in the cooler region without visible movement of the medium. b) The transfer of heat in which energy from particles in the cooler region is passed on to particles in the warmer region without visible movement of the medium. c) The transfer of heat in which energy from particles in the warmer region is passed on to particles in the cooler region with visible movement of the medium. Ans: (a)

  9. Q2 • Which of these are heat conductors? a) plastic and steel b) paper and glass c) copper and iron d) wood and aluminium Ans: (c)

  10. Q3 • Which of these will gain heat the quickest? a) rubber b) plastic c) copper d) nylon Ans: (c)

  11. This is the end of our presentation. Thank You!!!

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