Two objects, with different sizes, masses, and temperatures, are placed in thermal contact. In which direction does the energy travel?
Correct answer: C. Energy travels from the object at higher temperature to the object at lower temperature
- A. Energy travels from the larger object to the smaller object
- B. Energy travels from the object with more mass to the one with less mass
- C. Energy travels from the object at higher temperature to the object at lower temperature
- D. Energy does not travel
Explanation
If two objects at different temperatures are brought in contact with each other, energy is transferred from the hotter object (that is, the object with the greater temperature) to the colder (lower temperature) object, until both objects are at the same temperature .
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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