Literally Laundering Money Can Save Billions of Dollars
A dollar bill gets around, passing from hand to hand, falling on streets and sidewalks, eventually getting so grimy that a bank machine flags it and sends it to the shredder. Rather than destroying it, scientists have developed a new way to clean paper money to prolong its life. The research, which appears in the ACS journal Industrial & Engineering Chemistry Research, could save billions and minimize the environmental impact of banknote disposal.
Read more: http://www.laboratoryequipment.com/news/2014/01/literally-laundering-money-can-save-billions-dollars
These fun illustrations by Norbert Mayer celebrate animals that have traveled in space.
Magnetic induction - the levitating bbq
At the Palais de la Decouverte in Paris, a 1kg aluminium plate is levitated above a large coil of wire that is being supplied with 800A of alternating current at 900Hz.
Note the flare of the globes on the lamp when he moves it into the magnetic field and the steam coming off the surface - it’s also humming with the frequency of the alternating current. If you have time I recommend watching the video - it is very entertaining.
Men in black is how we feel on the inside
Fast-spinning star tests Einstein’s theory of relativity
Does a hammer fall faster than a feather? Does nature of a falling body matter to gravity? A pulsar may be changing things.
THIS IS SATURDAY!
Trigonometry Reference Circle
Created by Reddit user ‘graaahh’ via /r/mathpics
(Direct link to post here; picture found in comments)
If you look around yourself in the world, you don’t see anything that’s mathematical, right? But physicists have discovered that all this stuff is made out of elementary particles, like quarks and electrons. What properties does an electron actually have? It has the properties -1, ½, and 1. These are properties that we physicists have made up geeky names for, like electric charge and spin and lepton number. But they’re just numbers! They’re just mathematical properties!
So all these building blocks of nature, these particles, actually have no properties at all, except for mathematical properties. So in that sense, they are purely mathematical objects. Classic materialism is dead: “stuff” isn’t the end of the story.
And the same deal with the fabric of what’s around us, space itself. It has the property three, the number of dimensions. That’s a number. That’s a mathematical property. All this space and the stuff in space is purely mathematical with only mathematical properties.
Page 1 of 85