Physics

Problem

The average translational kinetic energy

K_{\text{avg}}

of the atoms in a solid is directly proportional to the absolute temperature

T

. Two identical copper blocks are initially at 450 K and 300 K, respectively, and are then placed in contact. What is the initial ratio

K_{\text{avg,hot}}/K_{\text{avg,cold}}

of the average kinetic energy per atom in the hotter block to that in the colder block? a)

1.22

0.67

1.5

2.25