Friction is what stops coins from spinning. In this video, The Action Lab demonstrates a number of spinning things nd spinning surfaces to explain how friction affects how long they spin, and the best surfaces for keeping them spinning as long as possible.
How to spin a coin for two minutes
How to calculate the power of a black hole collision
After writing about the collision between two black holes that weren't "supposed to exist," I received the following email from Álvaro Díez, a particle physicist at the University of Warsaw: Being a huge astrophysics enthusiast, I just built a Black Hole Collision Calculator that explains the after-effects of a star (or any astronomical object) being eaten by… READ THE REST
This grammar app can fix all your typos, bad punctuation, sentence disasters, and more automatically
If you read through text composed by inferior writers, rife with spelling errors, grammar problems, fractured syntax and haphazard punctuation and you aren't appalled, then you might be the target audience for the services that WhiteSmoke provide. Rather than let writers continue scribbling out copy packed with linguistic landmines, the WhiteSmoke Grammar Checker is like… READ THE REST
This adjustable height standing desk can save you from a brutal killer: inactivity.
Scientists have found there's a danger just as impactful on your health as killers that everyone talks about like obesity or smoking. This one, though, is a lot more subtle. Researchers say that the threat posed by sitting for eight hours a day with little physical activity is just as harmful as some of the… READ THE REST
Wanna know if your brain is as fit as it can be? CogniFit Brain Training can tell you.
Your brain really is every bit the supercomputer that you think it is. Scientists found that over the course of your life, your modest human brain will hold up to 1 quadrillion pieces of information. You also have an average of 70,000 thoughts per day. Considering that, it's really no surprise that we can all… READ THE REST
