Question

a substance has a higher temperature when its particles have a higher average kinetic energy. imagine two different substances that are both pure, meaning they each contain only one type of matter. each substance has a different temperature. which two properties determine which substance has the higher temperature? the mass of one particle in each substance the average speed of the particles in each substance the mass of each substance the kinetic energy of the fastest particle in each substance

Explanation:

The average kinetic energy of particles in a substance is related to temperature. The formula for kinetic energy is $KE=\frac{1}{2}mv^{2}$, where $m$ is mass and $v$ is speed. So the mass of one - particle and the average speed of particles determine the average kinetic energy and thus the temperature.

Answer:

the mass of one particle in each substance, the average speed of the particles in each substance