How can we extend mechanics? Well, the ideal gas model seems to make sense. According to the kinetic theory of gases, we can model it as a whole lot of particles that collide elastically, and we know about elastic collisions. Everyone takes chemistry before this class, so everyone has seen the ideal gas model, but we still played with the PHeT simulation of gas properties to have that visual of our model. We also talked about the transfer of internal energy, or heating, that can happen, through conduction, convection, and radiation.