What’s the average density of the universe? One look out at the night sky will confirm that space isn’t a dense place — but still, its actual density could affect everything from the way it’s shaped ...

Whenever I try to figure out why some PC133 ram works on my motherboard and some doesn't, someone invariably mentions "density". What is this mythical "density" value of a particular memory chip? How ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...