Practice Quiz

AP Physics B Practice Exam - Question List

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16. Which of the following observations demonstrates that visible light waves are electromagnetic and not mechanical?
  1. Sunlight can pass through gas.
  2. Sunlight can pass through solids.
  3. Sunlight can pass through liquids.
  4. Sunlight can pass through a vacuum.
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17. A large container of cold water is moved from a refrigerator to a table. A hot piece of metal is placed into the water. Which of the following best describes the final temperature of the metal?
  1. higher than the final temperature of the water
  2. the same as the final temperature of the water
  3. lower than the initial temperature of the water
  4. the same as the initial temperature of the water
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18. Which of the following statements best explains why lightning is seen before thunder is heard?
  1. Electromagnetic waves travel faster than mechanical waves in air.
  2. Electromagnetic waves have a higher frequency than mechanical waves.
  3. Electromagnetic waves experience less interference than mechanical
    waves.
  4. Electromagnetic waves form faster than mechanical waves during a thunderstorm.
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19. A student is turning the handle of a generator. Another student connects a bulb to the generator. The bulb lights up. The first student continues to turn the handle of the generator at the same speed, but finds it harder to turn. Which of the following best explains this?
  1. Less mechanical energy is required when the bulb is lit.
  2. More energy is put into the generator when the bulb is lit.
  3. Less mechanical energy is required the longer the generator is turned and the bulb is lit.
  4. The energy requirement of the generator is the same at any speed whether or not the bulb is lit.
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20. Which of the following statements identifies the main difference between vector and scalar quantities?
  1. Only vectors have direction.
  2. Only scalars have magnitude.
  3. Only scalars have units associated with them.
  4. Only vectors have units associated with them.
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