calculation

Dot Physics

Category archives for calculation

What if everyone jumped?

Might as well jump. Jump. Go ahead, jump. – Van Halen Suppose everyone in the world got together and jumped. Would the Earth move? Yes. Would it be noticeable? Time for a calculation. Note: I am almost certain that I have done this before, but I can’t find where. Starting assumptions. 7 billion people. Average…

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…

Here is part of a picture some of my friends posted from a recent high school reunion. It may be hard to tell, but this is part of a picture of 7 females all wearing black. I just wanted to show you that they were indeed wearing black without giving away anymore details. If you…

Somewhere on the internet, I came across this Cracked.com article on movie myths about guns. The article wasn’t too bad, but I really liked this video they included from Arnold’s movie Commando. The myth for this particular clip was that guns never run out of ammo in the movies. Right away, I thought: I wonder…

How far will the car go?

Honestly, I was going to add this to my previous post about the jumping car but I didn’t because I wanted to finish. So, here it is and more. Actually, I will just make a projectile motion spreadsheet. That way, anytime you want to do a projectile motion problem, you can come here. Maybe this…

I am still thinking about the Red Bull Stratos Jump. Sorry, but there is just tons of great physics here. Next question – how big of a balloon would you need to get up to 120,000 feet? I am not going into the buoyancy details of Archimedes Principle – I think that was covered fairly…

Star Trek Space Jump

While I am still fresh on the Space Jump topic, let me take it to the extreme. Star Trek extreme. SPOILER ALERT But really, is this a spoiler alert if it is from the trailer of a movie that has been out forever? Of course, I talking about the latest Star Trek movie where three…

Oil Spill Estimation

I was going to just leave the oil spill in the gulf topic alone. Not because it isn’t important, obviously it is. Rather, I wasn’t going to do anything because I didn’t really have anything to add to the topic. After a couple of readers requested it, I think I do have something to add.…

If you have been on the internet, you surely have seen this website showing the sizes of different starships. Way cool. Here is a small sample – but it doesn’t do the site justice. You really need to go browse around. Of course, I can’t let something like this just go. One of the things…

Oak Trees are awesome

In this part of the world, we have oak trees. Technically they are called live oaks – but I don’t get it. Of course they are alive. I was at a soccer game and this is the tree I always look at. Look how far those limbs extend horizontally. That branch is about 12 meters…