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Like a giant bucket with a hole, the Funil Hydropower Plant sprays out an enormous jet of water. We can use its speed to calculate the depth of the reservoir.

To revist this article, visit My Profile, then View saved stories. It's another year and another Star Wars Day—May the 4th be with you. Following my tradition, I'm going to takesomeelementfrom The Empire Strikes Back. The great thing about using this movie is that it's so old—more than 40 years—that I don't have to worry about spoilers. I mean, if you haven't seen it by now, are you really going to watch it? So, here is the scene: Leia, Lando, and Chewbacca use the Millennium Falcon to escape from the Imperial forces on Bespin. On their way out, they grab Luke (he was literally just h...

I'm all about Falcon and the Winter Soldier—the latest Marvel show on Disney+. Don't worry, I'm not going to spoil anything serious. I just want to talk about the wingsuits in episode 1. Sam Wilson (Falcon) is dealing with a hostage situation aboard a military aircraft. The bad guys grab their hostage and jump out of the plane wearing wingsuits. If you haven't seen these, they are basically skydiving outfits with extra material between the arms and legs to make it like wings—thus the name. The hostage doesn't have a wingsuit, so they strap him on the back of one of the bad guy jumpers. ...

To revist this article, visit My Profile, then View saved stories. Happy Pi Day. Yes, it's March 14th. If you write that date like an American, it looks like this: 3/14, and that looks like 3.14. It's not the best representation of pi, but it will do. As is my tradition, I am going to do something with pi. (I have to keep the streak alive—my first Pi Day post was in 2010.) For today's pi post, let's talk about trains and things. In particular, how does a train stay on a track—especially when it's a track with a curve in it? It's easy right? You might think that these train wheels have a ...

To revist this article, visit My Profile, then View saved stories. It's fun to think about how we know stuff. For instance, the sun has a mass of about 2 x 10 30 kilograms. That is such an enormous mass that it's difficult to comprehend. And if it's so difficult for us to even imagine numbers that large, how would we go about finding those values? Well, the original method was to use some small masses, a stick, and a string. Yes, this is one of the important steps in determining masses of both the sun and all the planets in our solar system. It's called the Cavendish experiment—first pe...