Physcial Science Unit II

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Physcial Science Unit II
2011-10-04 00:30:48
Temperature Heat Waves Optics Wave Effects Electricity Magnetism

Test 2
Show Answers:

  1. A change of 100 degrees on a Celsisus scale is equal to how much on a Fahrenheit scale?
  2. 0 degrees on a Celsius scale corresponds to what reference point?
    The ice point
  3. The amount of heat required to raise 1 kg of water by 1 degree Celsius is called
    A kilocalorie
  4. The amount of heat requred to raise 1 kg of any substance by 1 degree Celsius is called
    The specific heat
  5. The amount of heat required to produce a phase change for 1 kg of any substance at the melting point is called
    Latent Heat of Fusion
  6. The first law of thermodynamics is based on
    The law of conservation of energy
  7. Applying the first law of thermodynamics to a gas in a cylinder with a movable piston and assuming the gas itself remains at a constant temperature, any heat added to the gas would produce
    work done by the gas to move the piston
  8. The 2nd law of thermodynamics implies that
    Heat can be utilized to do work only if a thermal reservoir at a lower temperature is available.
  9. Applying the 2nd law of thermodynamics to a fridge, we should expect that
    Energy must be supplied to it or it won't cool
  10. The ideal efficiency of a heat engine is dependent on
    The temperature of the hot reservoir and the cold reservoir between which the engine operates
  11. How close have scientists come to reaching an absolute zero on the Kelvin temperature scale?
    To within about one-billionth of a Kelvin
  12. Insulating houses by filling the space between the inside and outside walls with a material such as fiberglass is done mainly to reduce heat transfer through the space by
    Conduction and Convection
  13. Which process is due primarily to convection?
    The flowing of air from over cool water toward a warmer land area
  14. The amount of heat that flows from one solid body at a high temperature to another at a lower temperature is NOT influenced by
    The difference between their specific heats
  15. Radiation is the only possible means of energy transfer in
    Outer space, where all matter is essentially absent
  16. Heat would escape most readily through the high vacuum reg between the double walls of an unsilvered thermos bottle by
  17. Heat is transerred through solids primarily by the process of
  18. If very high temperatures cause the electrons to be separated from individual atoms and molecules, the material is then said to be in what phase?
  19. When material is found to have a definite volume, but no definite shape, and when it assumes the shape of any container its placed in, it is in what phase?
  20. If heat is added to a substance, but the temperature of that substance doesn't increase, we can conclude that the substance is
    undergoing a phase change
  21. The kinetic theory involves the motion of
    small, independent, indivisible particles (molecules)
  22. In SI units, pressure is expressed in N/Msquared or
  23. The ideal gas law deals with
    Volume, pressure, and temperature changes in gas samples
  24. When the temperature of a car tire increases as you drive on a long trip, the pressure in the tire should
    increase as long as the volune doesn't change