The recurring energy crises of the 1970s were not the result of any physical limitation on energy supply.

FORBES: "Too High" Prices Are a Symptom, Not the Cause, Of Our Problems

Some Web postings indicate it takes as much as 4 hours to charge the new iPad from a 31 percent to a 65 percent state of charge, which may reflect the impact of this fundamental physical limitation on recharge speed, despite how unhappy it makes users.

FORBES: Battery Chemistry Is Getting In The Way Of Apple's Vision

Location data gathered by the phones we call carry around every day is also not well protected by ECPA. While the Fourth Amendment law gives warrant protection against location information collected through a physical trespass, that limitation is weak since other tools can be used to avoid such legal hurdles.

FORBES: Lawmakers Propose Changes To Make Government Get Warrant Before Reading Your Email