Dot Physics

Archives for February, 2010

College is Uranium: Online Learning

Do you like my title? I will make a connection in just a bit. This post is mostly about online colleges. I saw on TV that Kaplan now has online courses. So, what do I think about that? Here are some points. Some people can learn online I think this is an important starting point.…

Green Laser and Fluorescence

Do you have a green laser pointer? You should. They are relatively inexpensive now. What if you take your laser pointer and aim it at stuff in your house? The laser dot always looks green, right? This is actually a pretty important point about color. Suppose I have the lights on in a room and…

Sport Science, Pulling and Friction

Forgive me for all the posts on ESPN’s Sport Science (example: Pulling and Power). I can’t help myself. In the short episode recently, Sport Science compared a football player pulling a sled with huge tires on it to a truck pulling stuff. I think their goal was to compare the power per kg from for…

I can pull more than 3000 POUNDS!

Note: This is part of my ongoing attack of ESPN’s show Sport Science. Really, I am continuing to look at the episode where they calculate a football player can produce 57,000 Watts by pulling some stuff. Wait…I don’t want to limit my stuff to Sport Science. I see this stuff all the time. The problem…

This came in the mail. This is an ad for someone’s online homework service (I am not saying who). The important part, that you might not be able to read, says: “Make Learning Part of the Grade” I think I can interpret this logo in two different ways. Both of these interpretations are not too…

Sport Science: Pulling and Power

I would like to continue my attack on the show Sport Science – ESPN. In this short episode, they are comparing the power of NFL player Marshawn Lynch with that of a truck. You can watch it here if you would like. There are two things that are not quite right with this episode, first,…

Looks like the show Sport Science (on ESPN) might take the place of Fetch! With Ruff Ruffman as the target of my bad-science attacks. Note: it looks like ESPN has the short episode I will be attacking online, so check it out. Let me start off with the big problem (which The Onion already talked…

So, I put together part of my online textbook (finally). Let me give a little history and insight into this ‘textbook’. Ok – I blog, I am sure you got that part already. When I write a post, I like it to start from the basic ideas so that anyone could find it and get…

Physics Textbook

The following is a collection of some of my posts that can be put into a simple and quick textbook-type thingy. I am not really sure you would call this a textbook, but maybe you would. This does not include everything you would normally find in a traditional textbook, but clearly it is not traditional.…

How do you represent vectors?

Recently, I was talking about vectors. At that time, I had to stop and recall how I had been representing vectors. Ideally, I should stick with the same notation I used in Basics: Vectors and Vector Addition. But let me go over the different ways you could represent a vector. Graphical Maybe this is too…