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User: foufoux

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  1. The Heaviest on Schoolboy Corrects NASA's Math On Killer Asteroid · · Score: 1

    ... it will create a ball of iron and iridium 320 metres (1049 feet) wide and weighing 200 billion tonnes ... Strange... Using basic maths : The Volume of the Ball 320 meters wide is : 4/3*Pi*(D/2)^3
    In this case, we are looking at 4/3*Pi*(320/2)^3,
    So V = 12867963.5 m^3

    So now, let's look at the density : d = W/V
    Basic division gives us : d = 1554,25 g.cm^-3

    According to wikipedia :
    iron density is 6.98 g.cm^-3
    iridium dentisty is 22.42 g.cm^-3

    So, do we discover a new metal ?

    Or do we need a other kid to find the mistake ?
  2. fifty-fifty on What Spooks Microsoft's Chief Security Advisor · · Score: 1

    over half of computer attacks seen by Microsoft come from the .edu domain IT Teachers have too much free time on their hands... But I bet the other half comes from .cn domain.