Topics in Depth

Topics in Depth

States of Matter

Matter makes up almost everything we think of when we think of "stuff." Matter is anything that has mass and occupies space, so dad, the apple pie in the fridge, the ice cream, the molecules in the...

Mechanics of Fluids

ForcesBefore we can talk about fluids, we need to talk about a few other things to help us talk about fluids like forces. Remember what a force is? No, not the Force but a force. We associate force...

Density

Now that we know to think of fluids as being continuous, we'll define certain properties that exist in the real world: a world where a drop of water is a drop of water and isn't made up of 3 × 102...

Pressure

Now, it's time to define another macroscopic property and simplify our lives.We've heard magicians asking innocent volunteers to lay down on a bed of nails. As scary as it sounds, this trick is not...

Hydrostatic Equilibrium

Atmospheric PressureEver heard of atmospheric pressure? When people talk about the weather, they drop information about atmospheric pressure all the time, even if people have no idea what it is. So...

Archimedes' Principle

Archimedes and the Crown of GoldEver heard the expression Eureka? According to the Merriam-Webster dictionary, we use eureka to "express triumph on a discovery." It is derived from the Greek word h...

Fluid Dynamics

We started this unit by defining a fluid as any matter that flows when a force is applied to it. This includes amorphous solids in addition to liquids and gases. Then we began an exploration of flu...

Common Mistakes

States of MatterWe sometimes get confused because these three states appear to be so different. A water molecule is fundamentally two hydrogen atoms bonded to an oxygen atom. Yet the same H2O molec...

Test Your Knowledge

States of Matter1. While making a carrot cake for her physics professor, Nicole uses the following ingredients: flour, sugar, eggs, milk, raisins, and carrots. After mixing all ingredients, she pou...