AP Physics B Practice Exam

Category - Introductory Physics

Which of the following statements best explains why drops of liquid form on the outside of a glass of ice water on a hot day?
  1. Water molecules in the air are attracted to the surface of the glass.
  2. Water molecules in the ice water lose energy as they transfer heat to the air.
  3. Water molecules in the air lose energy as they transfer heat to the cold glass.
  4. Water molecules in the ice water move through the glass pores to the outside of the glass.
Explanation
Answer: C - Water molecules in the air lose energy as they transfer heat to the cold glass.
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