Answer:
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:
E_k = \frac{3}{2}kTEk=23kT
where
E_kEk 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.
