I'm looking for a Hi-End convertible Tablet PC - the slimmest, the fastest (Core i5, i7 or better), at least 6 GB of memory (1024 MHz bus or better). The more battery lifetime the better but at least 5 - 6 hours.

Let's face it, many of the interesting and needed internet things were already invented and successfully put on the market. Google, Yahoo, Craigslist, PayPal, Wikipedia, eBay, Facebook, Twitter, and many other websites and services basically...

Can anybody explain the car braking physics in simple language but giving mathematical ground? Especially I'm interested to know why the car leans forward and how to calculate the operating forces.