Dot Physics

Archives for January, 2009

Podcasts are great. While cleaning the car today, I listened to a new one – Stuff you missed in history class (itunes link). In one episode, they were talking about alternative theories about early visits to America. There was some guy that was claiming the Chinese visited the new world 70 years before Columbus (or…

It has been windy here lately. Sometimes I think that is an ok thing. You see, when I ride my bike to work I am probably going to have the wind at my back for one of directions. It is great feeling like Lance Armstrong because of the boost you get from the wind. With…

Learning Student Names

I just finished my first class of “Physics for Elementary Education Majors”. The maximum size for the class is 32 students and it is very interactive. I make it a point to learn student names as quickly as possible. This is something I am terrible at. Should you memorize names? If it is a reasonable…

Notes on Blogging from a non-expert

I was going to title this post “Blog-a-lama-ding-dong” but I read somewhere that the title should be very descriptive (for better search optimization). So, my brother decided to start a blog. He was looking for some direction. I am by no means an expert blogger, but I do have some ideas about blogging. But remember…

Tools: Error bars on graphs

I am not going to try and even surprise you with this. Notice the “tools:”. This post is not about physics really, but something used in physics. When I get enough of these, I will put them together in a “tools” page – or you can just use the tools-tag. Suppose you have some data.…

I am getting ready for classes. One class I am teaching is a physics course for elementary education majors. I really enjoy this class. There is hardly any math and the students learn by doing some experiments and then creating models. These models are then shared and discussed among the class. The basic points of…

So, here is a video (from break.com – so you know it is likely fake). null – Watch more free videos If for some reason, you can not view this video, here is the plot. Guy wears parachute and brings a portable thing like a see-saw. Guy approaches large crane dropping a large mass repeatedly…

Here is an article from Wired.com that talks about a used cooking oil generator. It’s a really neat idea in that the oil is right there anyway. Here is my problem – from the article: A new garage-engineered generator burns the waste oil from restaurants’ deep fryers to generate electricity and hot water. Put 80…

A Story and some probability

I am going to tell a story and then calculate the probability of part of it happening. Really, it’s just an excuse for me to put this online (since no one got hurt). My parents have this house on a lake, but it is really hilly. There is a dock down there, but it is…

Water Bottle Rocket Guy

I saw this video posted on Physics and Physicists: It reminded me that I had at one point tried to analyze this. I had actually posted something about this on the first generation of my blog (which no longer exists). I have found the analysis, and here it is from the archives. Thanks ZZ for…