Unit 1 - Physics

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1. What are the differences between a solid and a liquid?

  • particles in a solid less energy and are very dense where as liquids take shape of a form they are in.
  • a liquid is a melted solid
  • one is more thin then another
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2. What is infrared radiation?

  • Infrared radiation is a type of electromagnetic wave
  • heat
  • a type of conduction

3. Why are liquids and gases poor thermal conductors?

  • they have more energy so are therefore less dense and more spread out so it takes a long time to heat
  • they are too thin

4. Why is the inside of a vacuum flask shiny?

  • to reflect all heat emitted by the hot drink inside
  • to absorb heat
  • to keep the drink hot

5. Why is the handle of a kettle plastic?

  • because plastic is a poor conductor so it wont heat up and burn you
  • cause its chaep
  • cause it stops you burning yourself

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