# Tag archives for physics

You know I have trouble letting stuff go, right? I am still thinking about these crazy long basketball shots. Here are some more thoughts. Really, there are two things I am interested in. First, commenter Scott Post suggests that the drag coefficient might be around 0.25 instead of 0.5. I don’t know. For the discussion…

# Potentiometer for angle measurements

There is something I am working on that will need some type of angle sensor. I am going to use a potentiometer. First, who came up with that name? Isn’t this name the same as a voltmeter? Something is wrong with that name. How about we just call it a variable resistor or something like…

# Kindle vs. iPad in the Sun

There is this commercial that has been coming on lately showing some people reading the Kindle at the beach. Why is this a selling point? It has to do with the way the Kindle works compared to something like the iPad. I would take a picture, but I have neither of these devices. Instead, I…

# Content overview for second semester physics

This summer I taught the part II of algebra-based physics. It is odd, but I rarely teach this course. I usually end up teaching the calculus-based version (with Matter and Interactions). There is something strange. If you look at the algebra-based physics I and calculus-based physics I, they are just about the same course. Both…

# Basketball shot – real or fake?

I have seen several videos similar to this. Real? Fake? How many tries did this take? Let the analysis begin. Before I do any analysis, let me state that I think this is not fake. I do not know that for sure, just my first guess. How would I tell if it is real or…

# Turn or go straight? Quick!

This is a classic problem. You are in a car heading straight towards a wall. Should you try to stop or should you try to turn to avoid the wall? Bonus question: what if the wall is not really wide so you don’t have to turn 90 degrees? Assumption: Let me assume that I can…

# What makes a good post?

First off, I think this is a really good post (not this self-referring post, but the post I am about to link to) Steak Dinner by Alemi at The Virtuosi In short, this post is about cooking steak and the measurements of the temperature of the meat. Why do I think this is a good…

# More Clicker stuff

I am seriously late on this stuff. First, by clickers I mean student response systems. In a previous post, I stated how much I like these things. The basic idea (in case you have never heard of them) is that these are small devices that students in a class have. The instructor (learning facilitator) presents…

# Wolfram Alpha Widgets

Try to say that 5 times really fast. Go ahead, try it. Well, at least it is not as difficult as Fox in Socks – man that book is a killer. This WAW is basically a means to embed Wolfram Alpha queries into a webpage. Pretty cool idea, but I am not sure how well…

# How fast is the Beacon of Gondor?

The Lord of the Rings trilogy came on TV again recently. My wife and I can’t help but to watch this even though we have it on DVD. Anyway, I was thinking about the part where Gondor sends a signal to Rohan asking them for military aid. Since this was before the invention of email,…