Step-by-step explanation:
The two properties that determine which substance has the higher temperature are the mass of the particles and their average speed.
The kinetic energy of a particle is directly proportional to its mass and the square of its speed, which means that particles with a larger mass or a higher speed will have a higher kinetic energy. Therefore, the substance with particles that have a higher average speed or a smaller mass will have a higher temperature, as the particles in that substance will have a higher average kinetic energy.
For example, if we compare two substances, A and B, and substance A has particles with a smaller mass and a higher average speed than substance B, then substance A will have a higher temperature. Conversely, if substance B has particles with a larger mass and a higher average speed than substance A, then substance B will have a higher temperature.