Physics Chapter 15 and 16

37. A good heat conductor is A) A poor insulator B) a good insulator C) neither a poor nor a good insulator

A) A poor insulator

13. The fact that desert sand is very hot in the day and very cold at night is evidence that sand has A) a low specific heat B) a high specific heats C) no specific heat

A) a low specific heat

51. The pupil of your eye is A) a net absorbed of radiant energy B) a net emitter of radiant energy C) neither a net absorbed nor emitter of radiant energy

A) a net absorbed of radiant energy

47. Objects that radiate relatively well A) absorb radiation relatively well B) reflect radiation relatively well C) both of these D) neither of these

A) absorb radiation relatively well

50. If you were caught in freezing weather with only a candle for heat, you would be warmer in A) an igloo B) a tent C) a wooden house D) a car

A) an igloo

52. Cold water will warm to room temperature faster in a A) black pot B) silver pot C) depends more on the size of the pots than their color

A) black pot

43. If air were a better conductor than it is, at night time the Earth would be A) considerably colder B) considerably warmer C) not appreciably different in temperature

A) considerably colder

11. Aluminum has a specific heat capacity more than twice that of copper. Place equal masses of aluminum and copper wire in a flame and the one to undergo the fastest increase in temperature will be. A) copper B) aluminum C) both the same

A) copper

40. Warm air rises because faster-moving molecules tend to move to regions of less ? A) density and less pressure B) pressure C) density

A) density and less pressure

56. Suppose you want to save energy and you're going to leave your warm house for a half hour on a cold day. You should turn the thermostat ? A) down B) up C) to room temperature

A) down

48. A good absorbed of radiation is a A) good emitter of radiation B) poor emitter of radiation C) good reflector D) none of these

A) good emitter of radiation

46. An object will normally be a net radiator of energy when its temperature is A) higher than its surroundings B) lower than its surroundings C) neither of these

A) higher than its surroundings

42. When a volume of air is compressed, its temperature A) increases B) deceases C) neither increases nor decreases

A) increases

If a poor absorbed of radiation were a good emitter, its temperature would be A) less than its surroundings B) more than its surroundings C) the same as its surroundings

A) less than its surroundings

14. If the specific heat of water were lower than it is, ponds on the cold of winter would be ? A) more likely to freeze B) less likely to freeze C) neither more nor less likely to freeze

A) more likely to freeze

21. If you stake out a plot of land with a steel tape on a very hot day, actual amount of land you will have will be A) smaller than measured B) larger than measured C) correct

A) smaller than measured

30. Can a sample of water possibly have the same volume after being warmed by several Celsius degrees? A) sometimes B) always C) stays the same

A) sometimes

58. It is commonly thought that a can of beverage will cool faster in the coldest part if a refrigerator. Knowledge of Newtons law of cooling ? A) supports this common knowledge B) shows this common knowledge to be false C) supports or contradicts this common knowledge

A) supports this common knowledge

33. Ice tends to from first at the A) surface of bodies of water B) bottom of bodies of water C) surface or bottom depending on the water depth

A) surface of bodies of water

53. Both black and white road surfaces absorb sunlight. At the end of a sunny day the warmer road surface will be ? A) the black surface B) the white surface C) Neither-there is no difference

A) the black surface

59. Waves emitted by the sun and terrestrial wave emissions are A) the same expect for their frequencies and wavelength B) entirely different kinds of waves C) identical

A) the same expect for their frequencies and wavelength

41. If a volume of air is warmed, it expands. If a volume of air expands, it A) warms B) cools C) neither warms nor cools

A) warms

6. When you touch a cold piece of ice with your finger energy flows ? A) from your finger to the ice B) at or about 30 degrees C C) more than 30 degrees C

A. From your finger to the ice

5. Place a kilogram block of iron at 40 degrees C unto a kilogram of water at 20 degrees C and the final temperature of the 2 becomes ? A) less than 30 degrees C B) at or about 30 degrees C C) more than 30 degrees C

A. less than 30 degrees C

8. The fact that a thermometer takes it own temperature illustrates ? A) Thermal equilibrium B) energy conservation C) the difference between heat and internal energy D) the fact that molecules are constantly moving

A. thermal equilibrium

32. Before ice can form on a lake, all the water in the lake must be cooled to A) zero degrees C B) 4 degrees C C) minus 32 degrees C D) None of the above, Ice can form at the surface regardless of the water temperature below.

B) 4 degrees C

15. Consider a metal ring with a gap cut in it. When the ring is heated, the gap? A) becomes narrower B) becomes wider C) retains its size

B) becomes wider

18. As a piece of metal with a hole in its cools, the diameter of the hole? A) increases B) decreases C) remains the same

B) decreases

20. If glass expands more than mercury, then the column of mercury in a mercury thermometer would else when the temperature? A) increases B) decreases C) neither of this

B) decreases

26. Consider a sample of water at 0 degrees C. If the temperature is slightly increased, the volume of the water ? A) increase B) decreases C) remains the same

B) decreases

31. Consider a sample of ice at 0 degrees C. If the temperature is decreased, the volume of the ice A) increases B) decreases C) stays the same

B) decreases

28. When water at 4 degrees C is heated it expands. When water at 4 degrees C is cooled, it A) contracts B) expands C) neither contracts nor expands

B) expands

45. The reason the sun's radiant energy is of shorter wavelengths than the Earth's because the sun ? A) has much more internal energy B) has a higher temperature than the Earth C) is an energy source while the Earth is primarily an energy receiver D) all of these E) none of these

B) has a higher temperature than the Earth

12. Some molecules are able to absorb large amounts of energy in the form of internal vibrations and rotations. Materials composed of such molecules have. A) low specific heats B) high specific heats C) none of the above

B) high specific heats

35. Your feet feel warmer on a rug than on a tile floor because a rug A) is usually warmer than the tile B) is a better insulator than tile C) for the same mass has more internal energy than tiles D) all of these E) none of these

B) is a better insulator than tile

16. When we enlarge a photograph of an iron ring, the image of the hole becomes? A) smaller B) larger C) neither smaller nor larger

B) larger

17. When an iron ring is heated, the hole becomes A) smaller B) larger C) neither smaller nor larger D) either smaller or larger, depending on the ring thickness

B) larger

22. If you stake out a plot of land with a brass tape on a very cold day, actual amount of land you will have will be A) smaller than measured B) larger than measured C) correct

B) larger than measured

36. Metals are both good heat conductors and good electrical conductors because of the ? A) similarity between thermal and electrical conductive properties B) looseness of outer electrons in the metal atoms C) relatively high densities of metals D) high elasticity of metals E) ability of metals to transfer energy easily

B) looseness of outer electrons in the metal atoms

10. A substance that heats up relatively quickly has a A) high specific heat B) low specific heat C) high conductivity D) low conductivity

B) low specific heat

38. One of the main reasons one can walk barefoot on red-hot coals of wood without burning the feet has to do with A) low temperature of the coals B) low thermal conductivity of the coals C) mind over matter techniques

B) low thermal conductivity of the coals

44. The higher the temperature of an object A) the longer the wavelengths it radiates B) the shorter the wavelengths it radiates C) makes no difference in the wavelengths its radiates

B) the shorter the wavelengths it radiates

29. During a very cold winter, water piper sometimes burst. The reason for this is A) the ground contracts when colder, pulling pipes apart B) water expands when freezing C) water contracts when freezing D) the thawing process releases pressure on the pipes E) none of these

B) water expands when freezing

Which of the following normally warms up fastest when heat is applied ? A) Water B) Iron C) Glass D) Wood E) All of the above choices are equally true

B. Iron

1. A temperature difference of 10 degrees Celsius is also equal to a temperature difference of 10 on the ? A) Fahrenheit Scale B) Kelvin Scale C) both of these D) neither of these

B. Kelvin Scale

3. Heat energy travels from an object with a high ? A) Internal Energy to an object with a lower internal energy B) temperature to an object with a lower temperature C) Both of these, for they say essentially say the same thing D) none of the above choices are true

B. Temperature to an object with a lower temperature.

4. Pour a liter of water at 40 degrees C into a liter of water at 20 degrees C and the final temperature of the two becomes. A) less than 30 degrees C B) at or about 30 degrees C C) more than 30 degrees C

B. at or about 30 degrees C

55. Newton's law of cooling applies to objects that are A) cooling B) heating C) both of these D) none of these

C) both of these

27. Which of the following contracts when the temperature is increased ? Equal volumes of A) iron B) wood C) ice water D) helium

C) ice water

57. Suppose you want to save energy and you're going to leave your cool house for a half hour on a hot day. You should turn the temperature setting on the air conditioner ? A) down a little B) up a little C) off altogether D) to room temperature

C) off altogether

54. A good reflector of radiation is a A) good absorbent of radiation B) good emitter of radiation C) poor absorber of radiation D) none of these

C) poor absorber of radiation

The planet Earth loose heat mainly by A) conduction B) Convection C) radiation D) all of these

C) radiation

2. Room temperature on the Kelvin Scale is about ? A) 100 K B) 200 K C) 300 K D) 400 K E) more than 400 K

C. 300 K

7. Heat energy is measured in units of ? A) joules B) calories C) Choices A and B are both true D) Choices A and B are both false

C. Choices A and B are true

34. Substances absorb heat energy by the process of A) conduction B) convection C) radiation D) all of these

D) all of these

39. Energy transfer by convection is primarily restricted to A) solids B) liquids C) gases D) fluids E) none of these

D) fluids

23. Which of the following expands most when the temperature is increased? Equal volumes of A) iron B) wood C) ice water D) helium

D) helium

24. Which of the following contracts most when the temperature is decreased? Equal volumes of A) iron B) wood C) Ice water D) helium E) All contracts the same

D) helium

19. When a bimetallic bar made of copper and iron strips is heated, the var bends strip. The reason for this is A) iron gets hotter before copper B) copper gets hotter before iron C) copper expands more than iron D) iron expands more than copper E) none of these

D) iron expands more than copper

25. Which of the following expands when the temperature is lowered ? Equal volumes of A) iron B) wood C) helium D) water at 4 degrees C E) None expands when the temperature is lowered

D) water at 4 degrees C