### Double Trouble – Summer School of Science

Today I got back from a ten day vacation in Croatia. Croatia is a beautiful country, renowned for its lush forests, crystal lakes, stunning mountains, and dreamy coast. The natural thing to do, therefore, is to stay cooped up for almost two weeks in the Gymnasium of the small town of Požega, and teach three … More Double Trouble – Summer School of Science

Not long ago, I started studying for my undergraduate degree in mathematics and physics at the Technion. This by itself is a good prospect, but in the process I also found myself added to various Facebook groups related to the studies. Looking at a particularly small one (11 members), I noticed that most of the … More Small Facebook Groups are Shaped by Strong Leaders

### The Hottest Day of the Year

The Question: Not long ago, all drenched in sweat after standing outside for five minutes, I asked myself, “what is the hottest day of the year?” The answer that immediately came to mind was, “summer solstice – the longest day of the year, of course!”, which is around the 20th of June. It makes sense … More The Hottest Day of the Year

### Shooting Yourself on a Carousel

Not long ago, a friend of mine asked the following question: “Theoretically how fast would you have to be going on one of these things to be able to shoot a gun and then hit yourself with the bullet?” A good question indeed. One could immediately answer “much faster than the bullet”, but we will … More Shooting Yourself on a Carousel

### How Dense?

In the last post I talked about the physics and considerations behind the gravity train. A crucial part of the calculations involves the average Earth density. This is what determines the period, or how fast the train will go. It also determines the pressure our tunnel must sustain, and the amount of work we must … More How Dense?

### Grav Train

We all love flying: it’s both an exhilarating experience and a fast way of getting from place to place. But jet planes are gas guzzling beasts and produce immense amounts of CO2. Plus, it can take an entire day to fly around the globe; way too long for impatient businessmen. Here I would like to … More Grav Train