Monthly Archives: November 2010

bouncing ball puzzle, prize for solution!

Each time a ball bounces, it loses e.g. 40% of its vertical kinetic energy.  Can you describe what happens to the ball? (Clarification for the pedantic: the ground is flat, and each part of the ball’s path is a parabolic … Continue reading

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big brother can track cell phones accurately en-masse, sans gps

Governments work with cellular operators to install a surveillance layer, which tracks and records the exact location and movement of all users’ cell phones, all at once, even when they are idle. The TruePosition Location Platform (TPLP) is used … Continue reading

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