Dot Physics

Archives for November, 2009

Another Blog Move

I am moving to ScienceBlogs.com. So, as I have said before, basically it will be the same stuff, new server. As of right now, only my new stuff is at http://ScienceBlogs.com/dotphysics, but soon all my old stuff will be there too. To summarize: It is not you, it’s me. Thousand points of light. Change your…

Energy in an exploding water heater

The more I think about the last MythBusters’ exploding water heater, the more cool things I see. How about I look at the energy of the explosion. There are three things I can look at: How much energy went into the water heater from the electric source? How much kinetic energy did the water heater…

More Punkin Chunkin Centrifugal Machine

This year’s episode of Punkin Chunkin is coming up (I think tomorrow). Discovery just showed a teaser commercial with the specifications for one team’s machine. If you are not familiar with Punkin Chunkin (World Championship Punkin Chunkin), the basic idea is to project some pumpkins. (note, if you waiting for the Discovery Channel show for…

Hello, my name is

I feel like a just came to a new school, or a new place. Well, I have migrated servers before, so this shouldn’t be too bad. It really is nice to be here at ScienceBlogs. If you are unfamiliar with what I do, basically I can summarize: Analyze stuff I see. This is usually from…

Everyone knows, or should know how much I like MythBusters. Here is the problem. Below is a picture of Adam analyzing the motion of a an exploding water heater. Actually, I applaud Adam for his creative use of the vernier caliper. Really, it is an example of “making things work”. However, in this case there…

In my previous post on launching a pumpkin (punkin chunkin) I essentially just looked at what happens to the pumpkin after it is launched. How fast would you have to shoot it to go 1 mile? The answer seems to be around 1000 mph and they are currently shooting them around 600 mph. The question…

MythBusters and the first water heater

Last night I saw the newest episode of MythBusters. One of the myths they revisited was the exploding water heater. Well, it turns out that I had an analysis of this first explosion, but I didn’t move it over when I switched software. So, here it is. In case you never saw the first episode…

Lab: The Charge of an Electron

Not really. Here are the details (and some data) for the Millikan Oil Drop Experiment without the oil drop that I talked about previously (originally from The Physics Teacher – lucky you, it was a featured article so it should still be available (pdf)). The basic idea that Lowell McCann and Earl Blodgett from U…

I need a little rock help

Maybe this isn’t that mysterious. However, quite some time ago my daughter found this rock in the backyard. First, you must understand that this is an odd occurrence. In this part of Louisiana, there really aren’t any rocks, just dirt. When she showed it to me, I readily dismissed it as some lava rock from…

Uncertainty and Video Analysis

This is for commenter JimP. How do you take into account uncertainty when using video analysis? A great question. The first thing to think about is where does the uncertainty come from? My first guess would that it would be from the user. Where does the user click? Is it right on the object in…