January 19, 2006. A piano-sized robot blasts upwards from Earth on a massive rocket and escapes the gravity of our home planet, bound for distant adventures. For a small community of scientists, launch day kicks off the long closing chapter of a story years in the making. To most of the world, it’s the beginning
It was a cold night in Russia’s Sakha Republic. Tiny Oymyakon, widely regarded today as the coldest town on Earth, was used to going about its business in near-arctic temperatures. On February 6, 1933, its residents braved the lowest temperature ever measured in an inhabited location: ninety degrees below zero, Fahrenheit.* Source: http://www.nasa.gov/sites/default/files/coldestplacerecords.png?itok=nAYJEo7W In
This isn’t your typical cloud, and not just because it’s trapped inside a bottle! We chose rubbing alcohol as the raw material for our homemade tabletop cloud because it vaporizes so easily: Rubbing alcohol is also highly flammable. Let’s explore this property by creating some combustion reactions! Every fire (or combustion reaction) requires fuel, an
Why do these liquids stack so cleanly? For the same reason that helium floats on air, and air floats on water: it’s all about density. Density, or mass per volume, measures how much stuff is squeezed into a given space. The higher the mass-to-volume ratio, the denser the object. A ten-gallon bucket of rocks
Imagine a torpedo in a wind tunnel. Incoming air slips around the torpedo’s nose, slides along its surface, and flies off its blunt back end. The air stream can’t navigate sharp corners, but as long as a smooth contour is available, it clings to that curve. This is called flow attachment, or the Coanda effect.