Grant Watson

Bookmarks

• Air Command Water Rockets Home
  A water rocket uses pressurised air to push water out the back of the rocket to produce thrust.
  
• Awesome DIY water rockets with drop-away boosters
  Single-stage soda bottle rockets over 600 feet using three drop-away booster engines that separate, NASA-style, when their thrust is spent. The boosters have upward-pointing pins that slip into rings on the main rocket, so they simply slip back out upon burnout.
  
• A Primer on Information Theory and Privacy | Electronic Frontier Foundation
  If we ask whether a fact about a person identifies that person... it turns out that ..., I could probably deduce their identity! Each of the facts is partially identifying.
  
• Balloon Aerial Photography in GrassrootsMapping
  With a helium filled balloon you can take your own aerial pictures, stitch them together, and view them with a web map like Cartagen or Google Maps.
  
• Homeopathy: There's nothing in it | The 10:23 Campaign | #ten23
  We will tell you how it can be proven not to work, why homeopaths' claims are impossible, why you should care.