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Mechanical comprehension · Difficulty 1

Try this ASVAB-style question.

Choose your answer before opening the explanation. This original practice item is for preparation and does not reproduce an official test question.

Question

Heat naturally flows from:

  1. Colder objects to hotter objects
  2. Hotter objects to colder objects
  3. Low mass to high mass only
  4. Liquids to solids only
Reveal answer and explanation

Hotter objects to colder objects

Without added work, thermal energy transfers from higher to lower temperature.