Question

what happens when the speed of particles decreases? their temperature decreases their mass increases their temperature increases their mass decre

Explanation:

Temperature is related to the average kinetic energy of particles. Kinetic energy depends on the speed of particles. When particle - speed decreases, kinetic energy decreases, and thus temperature decreases. Mass of particles is not directly affected by their speed in non - relativistic cases (and not in the context of this basic thermal physics concept).

Answer:

Their temperature decreases