World’s Lightest Solid!

World’s Lightest Solid!

This is aerogel. The world’s lightest, that is least dense, solid. This piece has a mass of just 1.22 grams. That is only a few times the mass of the same volume of air, which kind of makes sense because it is 99.8% air. In fact, some aerogels are so light that if you removed

अपनी कार को मोबाइल से बंद कीजिये||car security system india||Control Your Car From mobile phone

Make your own GPS SMS Security Tracking System

if you are like me then you probably have a precious vehicle in my case a mole cake which you don’t want to get stolen at all cost so to let me sleep better during the night I will show you in this project video how to build a shock activated SMS GPS tracking system