Different scales. Different forces

There is a very interesting discussion on Physics StackExchange on how long a straw can Superman suck from. Seen here Mark Eichelaub sucking with a 3 m straw After a lot of sophisticated calculus, the forum seems to conclude the answer is 15 m. I don't buy the math. Old superman could freeze a lake. …

Fix your flow, not the stock

I have been taking some interest in sports recently. This got triggered by the significant capital overlay for new shoes and rackets to support my sons' style over substance pursuit of tennis coaching. I am indulging my children nevertheless, having seen the wisom levels of those who play sports in their childhood being far greater …