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What is true for two pieces of iron at the same temperature? A. The average kinetic energy of their particles is the same. B. The total kinetic energy of their particles is equal. C. Heat flows from the larger object to the smaller object. D. Heat flows from the object with higher potential energy to the object with lower potential energy.

Respuesta :

meerkat18
When two pieces of substances are in thermal equilibrium, this means the amount of heat flowing in of one substance is equal to the amount of heat flowing from it. The temperature of the substance is related to the kinetic energy of the molecules. Answer is A 
skyluke89

A. The average kinetic energy of their particles is the same.

Explanation:

The temperature of an object is proportional to the average kinetic energy of its particles, following the relationship:

[tex]E_k = \frac{3}{2}kT[/tex]

where

[tex]E_k[/tex] is the average kinetic energy of the particles

k is the Boltzmann constant

T is the absolute temperature

From this relationship, therefore, we see that the average kinetic energy of the particles in a substance depends only on its temperature: therefore, since the two pieces of iron have same temperature, they also have same average kinetic energy.