During cooling, the kinetic energy of the molecules falls. why does this happen?
a.
the motion of the molecules increases.
b.
the motion of the molecules slows down.
c.
the van der waals forces between molecules decrease.
d.
the forces of attraction between the molecules are overcome.

B. the motion of the molecules slows down

has to do with kinetic

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )