System 1 has a large number of particles, moving slowly on average. System 2 has a smaller number of particles, but they are moving faster on average.

Which system has a higher temperature?

a) System 1 has a higher temperature because there are more particles. A greater number of particles have more kinetic energy than a smaller number of particles.

b) System 1 has a higher temperature because the particles are moving slowly. The particles in System 1 have greater kinetic energy than System 2.

c) System 2 has a higher temperature because the particles are moving with greater speed. The particles in System 2 have greater kinetic energy than System 1.

d) There is not enough data to tell. The larger number of particles in System 1 may or may not outweigh the increase in movement in System 2.