Physics Chapter 17

20 Questions  I  By Sarringhaus
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Quiz for chapter 17

  
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  • 1. 
    Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by 
    • A. 

      Conduction

    • B. 

      Condensation

    • C. 

      Evaporation

    • D. 

      Melting


  • 2. 
    The molecules in a room-temperature glass of water jostle around at 
    • A. 

      A great variety of speeds

    • B. 

      Much the same rates of speed

    • C. 

      A very small range of speeds


  • 3. 
    Evaporation is a cooling process and condensation is 
    • A. 

      A warming process

    • B. 

      A cooling process also

    • C. 

      Neither a warming nor cooling process


  • 4. 
    Evaporation is a cooling process because
    • A. 

      Heat is radiated during the process

    • B. 

      Of conduction and convection

    • C. 

      The more energetic molecules are able to escape the liquid

    • D. 

      The temperature of the remaining liquid decreases


  • 5. 
    To say that evaporation is a cooling process is to say that the
    • A. 

      More energetic particles escape

    • B. 

      More energetic particles remain in the water

    • C. 

      The less energetic particles escape


  • 6. 
    A hot dog pants
    • A. 

      To help evaporation occur in its mouth and bronchial tract

    • B. 

      To bring more oxygen into its lungs

    • C. 

      For no particular reason - some things just happen

    • D. 

      To impress dogs of the opposite sex


  • 7. 
    Steam burns are more damaging than burns caused by boiling water because steam 
    • A. 

      Gives up additional energy when it condenses

    • B. 

      Has more energy per kilogram than boiling water

    • C. 

      Choices A and B are both correct

    • D. 

      Choices B and C are both incorrect


  • 8. 
    We feel uncomfortably warm on a muggy day because water molecules are
    • A. 

      Evaporating from our moist bodies

    • B. 

      Condensing on our bodies

    • C. 

      Evaporating and condensing on our bodies at the same rate


  • 9. 
    We are warmed by condensation because water molecules in the air that strike our bodies 
    • A. 

      Transfer some of their kinetic energy to us

    • B. 

      Gain kinetic energy as they change state

    • C. 

      Form an insulating layer on our bodies


  • 10. 
    When a gas is changed to a liquid state, the gas
    • A. 

      Releases energy

    • B. 

      Absorbs energy

    • C. 

      Neither releases nor absorbs energy

    • D. 

      Both releases and absorbs energy


  • 11. 
    When a solid is changed to a liquid state, the solid 
    • A. 

      Releases energy

    • B. 

      Absorbs energy

    • C. 

      Neither releases nor absorbs energy

    • D. 

      Both releases and absorbs energy


  • 12. 
    When liquids change to a solid state, they
    • A. 

      Absorb energy

    • B. 

      Release energy

    • C. 

      Neither absorb nor release energy

    • D. 

      Both absorb and release energy


  • 13. 
    Which could burn a boy scout the most?
    • A. 

      100 g of water at 100 degrees C

    • B. 

      100 g of steam at 100 degrees C

    • C. 

      Both would be equally damaging


  • 14. 
    When heat is added to boiling water, its temperature
    • A. 

      Increases.

    • B. 

      Decreases.

    • C. 

      Does not change.


  • 15. 
    Boiling water does not increase in temperature when additional heat is applied because
    • A. 

      The temperature doesn't change in a change of state

    • B. 

      Added input energy doesn't increase the water's internal energy

    • C. 

      The increased heating produces increased boiling, and therefore increased cooling

    • D. 

      None of these


  • 16. 
    For increased atmospheric pressure, the boiling temperature of a liquid
    • A. 

      Goes down

    • B. 

      Goes up

    • C. 

      Remains at 100 degrees C


  • 17. 
    Increased air pressure on the surface of hot water tends to
    • A. 

      Prevent boiling

    • B. 

      Promote boiling

    • C. 

      Neither choice A nor choice B is true

    • D. 

      Choice A and choice B are both true


  • 18. 
    Near the top of a mountain, water in an open pot boils at
    • A. 

      A higher temperature than at sea level

    • B. 

      A lower temperature than at sea level

    • C. 

      The same temperature as at sea level

    • D. 

      None of the above choices are true


  • 19. 
    The food in a refrigerator is cooled by
    • A. 

      Vaporization of the refrigerating fluid

    • B. 

      Condensation of the refrigerating fluid

    • C. 

      The ice in your nearby freezer


  • 20. 
    You can briefly touch a hot clothes iron with a bare wet finger because the wetness
    • A. 

      Choices C and D are both true

    • B. 

      Only Choice C is true

    • C. 

      Absorbs energy in vaporizing

    • D. 

      Provides an insulating layer after it changes state


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