What are the results of collisions between faster-moving particles and slower-moving particles?

The kinetic energy of the faster-moving particles is higher. Energy flows from high to low, resulting in a uniform distribution of energy among the particles.

As a result, the particles that move more slowly eventually move a bit faster, and the particles that move faster eventually move a bit slower.

They would all get close to the same average kinetic energy, and consequently, the same temperature and root-mean-square speed, if they were perfect particles that conserve kinetic energy.

In general, faster-moving particles transfer some of their kinetic energy to slower-moving particles upon collision, which can lead to changes in the velocities and directions of both particles. This process is governed by the principles of conservation of momentum and conservation of kinetic energy. The outcomes of collisions between faster-moving particles and slower-moving particles depend on factors such as the masses and velocities of the particles as well as the nature of the collision.