The Physics Philes, lesson 126: Kinetic-Molecular Model of Ideal Gases, Part 1

As promised, this week we’ll start a discussion on the kinetic-molecular model of ideal gases. Be warned: we’ll have to take this in chunks. Now that that’s out of the way…what is the kinetic-molecular model of idea gases? Basically, it’s a way to understand the properties of a bunch of …


The Physics Philes, lesson 106: The Sound of Physics

We’ve just spent basically forever getting our hands dirty with mechanical waves. Now it’s time to get our hands even dirtier with a specific type of mechanical wave: the sound wave. Sound waves are something most of us are familiar with. The general definition of sound is actually quite simple. …


The Physics Philes, lesson 68: Cracking Under the Shear Pressure

Last week we started talking about stress and strain, and I attempted to explain tensile stress and strain. But did you know there are a whole two other types of stress and strain? There are! These stresses and strains are called bulk and shear. Let’s first tackle bulk stress and …